There are 34 routes assigned to the "S" zone of the California Route Marker Program, which designates

county routes in California County routes in the U.S. state of California are controlled and maintained by the respective counties in which they are located. However, they are generally patrolled by the state's California Highway Patrol. They are typically major thoroughfa ...

. The "S" zone includes county highways in Imperial,

Orange Orange most often refers to: *Orange (fruit), the fruit of the tree species '' Citrus'' × ''sinensis'' ** Orange blossom, its fragrant flower ** Orange juice *Orange (colour), the color of an orange fruit, occurs between red and yellow in the vi ...

, Riverside,

San Diego San Diego ( , ) is a city on the Pacific coast of Southern California, adjacent to the Mexico–United States border. With a population of over 1.4 million, it is the List of United States cities by population, eighth-most populous city in t ...

, and Santa Barbara counties.

S1

County Route S1 (CR S1), also known as Sunrise Highway for a portion of its length, is a long

county highway A county highway (also county road or county route; usually abbreviated CH or CR) is a road in the United States and in the Canadian province of Ontario that is designated and/or maintained by the County (United States), county highway departm ...

located entirely in

San Diego County, California San Diego County (), officially the County of San Diego, is a county (United States), county in the southwest corner of the U.S. state of California, north to its Mexico-United States border, border with Mexico. As of the 2020 United States Cen ...

, United States. It begins at State Route 94 (SR 94) near Barrett and moves northward across Interstate 8 (I-8), just west of the

Laguna Summit Laguna Summit is a highway pass through the Cuyamaca Mountains of southeastern San Diego County, California, traversed by Interstate 8 at an altitude of . Of the four highway summits eastward of San Diego, the Laguna Summit is the second. The fi ...

. This segment is also known as Buckman Springs Road. North of I-8, it is the Sunrise Scenic Byway, a

National Forest Scenic Byway The National Forest Scenic Byways are roads that have been designated by the U.S. Forest Service as scenic byways. Many are also National Scenic Byways (NSB). The program was initiated in 1987. List The following roadways were listed by the Fede ...

. ;Route description The route begins at SR 94 near Barrett not far from the Mexican border. From there, it heads northward along Buckman Springs Road. Soon afterwards, it enters the

Cleveland National Forest Cleveland National Forest is a National forest (United States), U.S. national forest in Southern California that encompasses 460,000 acres/ of inland Montane ecosystems, montane regions. It is approximately 60 miles from the Pacific Ocean, withi ...

. When the road reaches

Interstate 8 Interstate 8 (I-8) is an Interstate Highway in the southwestern United States. It runs from the southern edge of Mission Bay at Sunset Cliffs Boulevard in San Diego, California, almost at the Pacific Ocean, to the junction with I-10, ...

, while Buckman Springs Road continues northeastward across the freeway, CR S1 continues in a northwest direction along Old Highway 80, the original alignment of

U.S. Route 80 U.S. Route 80 or U.S. Highway 80 (US 80) is a major east–west United States Numbered Highway in the Southern United States, much of which was once part of the early auto trail known as the Dixie Overland Highway. As the "0" in the ...

in California. It then closely parallels I-8 for several miles. Upon crossing the freeway at Laguna Junction, CR S1 separates from Old Highway 80 and becomes Sunrise Scenic Byway. From

, it begins its ascent into the Laguna Mountains. The route here was built along a cliff overlooking Pine Valley to its west. Around here, the vegetation still consists of

chaparral Chaparral ( ) is a shrubland plant plant community, community found primarily in California, southern Oregon, and northern Baja California. It is shaped by a Mediterranean climate (mild wet winters and hot dry summers) and infrequent, high-intens ...

and

sagebrush Sagebrush is the common name of several woody and herbaceous species of plants in the genus ''Artemisia (plant), Artemisia''. The best-known sagebrush is the shrub ''Artemisia tridentata''. Sagebrush is native to the western half of North Amer ...

. As the route gains elevation through

, the route becomes more heavily forested. Around here, numerous campgrounds dot the side of the road. There is a picnic area overlooking

Anza-Borrego Desert State Park Anza-Borrego Desert State Park (, ''Help:Pronunciation respelling key, AN-zə bə-RAY-goh'') is a California State Park located within the Colorado Desert of Southern California, United States. Created in 1932, the park takes its name from 18th ...

near the Burnt Rancheria Campground, which is often said to deeply contrast the forest scenery along the route. Upon passing the settlement of

Mount Laguna Mount Laguna is a small census-designated place (CDP) in San Diego County, California. It is approximately above sea level in a forest of Jeffrey pine, east of San Diego in the Laguna Mountains on the eastern edge of the Cleveland National Fores ...

, the vegetation along the route mostly consists of dead trees devastated by the 2003

Cedar Fire The Cedar Fire was a massive, highly-destructive wildfire, which burned of land in San Diego County, California, during October and November 2003. The fire's rapid growth was driven by the Santa Ana winds, causing the fire to spread at a rat ...

. The route continues through the Anza-Borrego Desert State Park. As the route approaches its north end at State Route 79,

Lake Cuyamaca Lake Cuyamaca, also called Cuyamaca Reservoir, is a reservoir, nature park and recreation area in the eastern Cuyamaca Mountains. It covers in East County, San Diego. Geography California State Route 79 wraps around three shores, and provides acc ...

is visible. The north terminus is located just north of

Cuyamaca Rancho State Park Cuyamaca Rancho State Park is a state park in inland San Diego County, California, United States, located east of the metropolitan area of San Diego, California, San Diego. The park is situated near the southernmost reaches of the Cleveland Nat ...

where it meets SR 79. ;History The route was established by the county in the year 1959, where the entire route was designated as it is now. No major numbering or routing changes occurred throughout its history. The northern segment of the route was also established as a Scenic Byway in 1959. ;Major intersections ;Gallery Sandiegos1photoa.jpg, Bridge over Cottonwood Creek Sandiegocountys1photob.jpg, Buckman Springs Road and Old Highway 80 Sandiegocountys1photoc.jpg, Bridge over I-8 Sandiegocountys1photod.jpg, CR S1 near Al Bahr Shrine Camp Sandiegocountys1photoe.jpg, California Riding and Hiking Trail Sandiegocountys1photof.jpg, Junction with SR 79

S2

County Route S2 (CR S2) is a

in the U.S. state of California. It runs for , north–south, in

Imperial County Imperial County is a county located on the southeast border of the U.S. state of California. As of the 2020 census, the population was 179,702, ranking as the least populous county in Southern California. The county seat and largest city is ...

and

San Diego County San Diego County (), officially the County of San Diego, is a county in the southwest corner of the U.S. state of California, north to its border with Mexico. As of the 2020 census, the population was 3,298,634; it is the second-most populous ...

. CR S2 is the third longest county route in California and is almost exclusively a two-lane rural road. It largely follows the route of the former

Southern Emigrant Trail :''The Southern Emigrant Trail should not be confused with the Applegate Trail, which is part of the Emigrant Trail, Northern Emigrant Trails.'' The Southern Emigrant Trail, also known as the Gila Trail, the Kearny Trail, the Southern Trail and ...

and

Butterfield Overland Mail Butterfield Overland Mail (officially Overland Mail Company)Waterman L. Ormsby, edited by Lyle H. Wright and Josephine M. Bynum, "The Butterfield Overland Mail", The Huntington Library, San Marino, California, 1991. was a stagecoach service in ...

. ;Route description Starting at mile marker zero, the highway begins at a junction with State Route 79 near the community of

Warner Springs Warner Springs is set of springs and a small unincorporated area, unincorporated community in northern San Diego County, California. It is on the Pacific Crest Trail. Geography Warner Springs has a post office; its ZIP Code is 92086. It is loca ...

. As it descends southeast toward the desert floor it becomes San Felipe Road until it crosses State Route 78 at Scissors Crossing in Shelter Valley (formerly called

Earthquake Valley Earthquake Valley is a desert valley east of Julian, California, which contains parts of Anza-Borrego Desert State Park. It is the location of the Shelter Valley Ranchos subdivision, which is also known as the unincorporated community of Shelter ...

). South of SR 78, the name of the highway changes to the Great Southern Overland Stage Route of 1849. It passes through Blair Valley, Canebrake Canyon, Vallecito, and Agua Caliente. Further south, it forks at a remote junction with the historic dirt road to become to Sweeney Pass Road. Sweeney Pass is located between the Volcanic Hills and the Coyote Mountains. East of the San Diego/Imperial County Line of this segment is also called

Imperial Highway The Imperial Highway is a west-east thoroughfare in the counties of Los Angeles, Orange, Riverside, San Diego, and Imperial in the U.S. state of California. The main portion of the existing route begins at Vista Del Mar in Los Angeles near t ...

. The highway runs south through an interchange with

then ends at a junction with State Route 98 near

Ocotillo ''Fouquieria splendens'', commonly known as ocotillo, is a plant indigenous to the Mojave, Sonoran, Chihuahuan and Colorado deserts in the Southwestern United States (southern California, southern Nevada, Arizona, New Mexico, Texas), and nor ...

. ;Gallery Highways2signs.jpg, Street signs on CR S2 Sanfeliperoad1.jpg, San Felipe Road north of Scissors Crossing Anza Borrego Agua Caliente.jpg, Agua Caliente Springs, desert landscape and CR S2 going south, in

. Borrego Springs, California as seen from County Route S2.jpg,

Borrego Springs Borrego Springs (''borrego'' is Spanish for "sheep") is a census-designated place (CDP) in northeastern San Diego County, California. It is located within the Low Desert area of Southern California. The population was 3,073 at the 2020 census. ...

and the surrounding desert as seen from the descent near the Montezuma Valley Road lookout. Shelter Valley as seen from the Pacific Crest Trail north of the community.jpg, Scissors crossing seen from the north, along the

Pacific Crest Trail The Pacific Crest Trail (PCT), officially designated as the Pacific Crest National Scenic Trail, is a long-distance hiking and equestrian trail closely aligned with the highest portion of the Cascade and Sierra Nevada mountain ranges, which lie ...

.: Shelter Valley California Fire Department and Community Center (2011).jpg, Shelter Valley California Fire Department and Community Center on CR S2. Warner's Ranch (WEST ELEVATION OF RANCH HOUSE).jpg,

Warner's Ranch Warner's Ranch, near Warner Springs, California, was notable as a way station for large numbers of emigrants on the Southern Emigrant Trail from 1849 to 1861, as it was a stop on both the Gila River Trail and the Butterfield Overland Mail stagec ...

, Ranch House, San Felipe Road (CR S2),

. ;Major intersections

S3

County Route S3 (CR S3) is a

, United States. It begins at a junction with State Route 78 and runs roughly north over Yaqui Pass to

, bearing the name Yaqui Pass Road. It turns left onto Deep Well Trail and left again onto Borrego Springs Road. It ends at a junction with County Route S22 at a large

roundabout A roundabout, a rotary and a traffic circle are types of circular intersection or junction in which road traffic is permitted to flow in one direction around a central island, and priority is typically given to traffic already in the junct ...

known as Christmas Circle. Its total length is . There is one call box on this highway, located at Yaqui Pass summit. The highway is part of the

Juan Bautista de Anza National Historic Trail The Juan Bautista de Anza National Historic Trail is a trail extending from Nogales on the U.S.-Mexico border in Arizona, through the California desert and coastal areas in Southern California and the Central Coast region to San Francisco.

Auto Tour Route. File:SD-CR-S3 CA-78 junction.jpg, Junction with State Route 78 File:Yaqui Pass Road.png, Yaqui Pass Road west of Yaqui Pass File:Yaqui_Pass.png, Yaqui Pass on ;Major intersections

S4

County Route S4 (CR S4) is a road in

, United States, in the northern city limits of

and in the city of

Poway Poway () is a city in San Diego County, California, United States. Poway's rural roots influenced its motto "The City in the Country". The city had a population of 48,841 as of the 2020 United States census. Poway is part of San Diego's Eas ...

. The route is traversed entirely by Poway Road from

Interstate 15 Interstate 15 (I-15) is a major Interstate Highway in the Western United States, running through Southern California and the Intermountain West. I-15 begins near the Mexican border in San Diego County and stretches north to Alberta, Ca ...

east to State Route 67. The route's western terminus is at

I-15 I15 may refer to: * Interstate 15, a north–south Interstate Highway in the United States of America * Polikarpov I-15, a Soviet fighter aircraft * I15 (band), a band * , of the Imperial Japanese Navy * Älvsborg Regiment The Älvsborg Regiment ...

, where the road continues west as Rancho Penasquitos Boulevard, traverses across SR 56, and finally ends as Carmel Mountain Road. Eastward, the road traverses through the city of

as Poway Road and has its east end at SR 67. Within Poway, it is one of the busiest streets in the city. The route was established in 1959. ;Major intersections

S5

County Route S5 (CR S5) is a road in

, United States, in

and

. It runs from its southern end at Poway Road ( County Route S4) in Poway to its northern end at

in San Diego. ;Route description The road's south end is at Poway Road (CR S4) in Poway. It winds north through Poway as Espola Road and then turns slightly west, ending at Interstate 15 as Rancho Bernardo Road (which continues past I-15). The route was established in 1959. ;Major intersections

S6

County Route S6 (CR S6) is a

, United States. It connects Del Mar with

Palomar Mountain Palomar Mountain ( ; ) is a mountain ridge in the Peninsular Ranges in northern San Diego County, California. It is known as the location of Palomar Observatory and Hale Telescope, and known for Palomar Mountain State Park. History The Luise� ...

across San Diego County. It is one of a few San Diego county routes with a discontinuity in its routing. Californias6palomar

;Route description CR S6 starts at CR S21 in Del Mar as Via de la Valle. It crosses

Interstate 5 Interstate 5 (I-5) is the main north–south Interstate Highway System, Interstate Highway on the West Coast of the United States, running largely parallel to the Pacific coast of the contiguous U.S. from Mexico to Canada. It travels thro ...

and meets with CR S8 in

Rancho Santa Fe Rancho Santa Fe is a census-designated place (CDP) in San Diego County, California, United States, within the San Diego metropolitan area. The population was 3,156 at the 2020 census. The CDP is primarily residential with a few shopping blocks, ...

at the intersection of Via de la Valle and Paseo Delicias. At El Camino Del Norte, the name changes to Del Dios Highway, past the community of Del Dios and into Escondido. In Escondido, CR S6 runs along West and East Valley Parkways, to Valley Center Road through Valley Center. CR S6 ends at State Route 76. About east on SR 76, CR S6 begins again as South Grade Road, which winds northward on

. It intersects with CR S7, then continues north until it ends at the

Palomar Observatory The Palomar Observatory is an astronomical research observatory in the Palomar Mountains of San Diego County, California, United States. It is owned and operated by the California Institute of Technology (Caltech). Research time at the observat ...

The route was defined in 1959. ;Major intersections

S7

County Route S7 (CR S7) is a

, United States, that provides access to

. ;Route description CR S7's western terminus is at State Route 76 east of

Pauma Valley, California Pauma Valley (''Pauma'', Luiseño for "place where there is water") is a geographic valley and unincorporated community between Valley Center and Palomar Mountain in San Diego County, California. The name also refers to the agricultural regio ...

. It begins as a dirt road known as the Nate Harrison Grade. Then it returns to pavement as it ascends Palomar Mountain and meets

San Diego County Route S6 There are 34 routes assigned to the "S" zone of the California Route Marker Program, which designates county routes in California. The "S" zone includes county highways in Imperial County, California, Imperial, Orange County, California, Orange ...

. It enters Palomar Mountain State Park. Then, it descends to end at SR 76 near

Lake Henshaw Lake Henshaw is a reservoir in San Diego County, California, at the southeast base of Palomar Mountain, approximately northeast of San Diego and southeast of Los Angeles. The lake covers approximately and holds of water when full (lowered in ...

. Nate Harrison Grade is not signed as County Route S7, but it is a logical westward extension of the signed portion. With a 10% grade, it was the only road to the top of Palomar Mountain until the 1940s, when East Grade Road ("Highway to the Stars") was built for the construction of the

. The road was formerly known as "Nigger Nate Road", named after Nate Harrison, an early African-American

homesteader Homestead may refer to: *Homestead (building), a farmhouse and its adjacent outbuildings; by extension, it can mean any small cluster of houses * Nguni homestead, a cluster of houses inhabited by a single extended family, typically with a kraal ...

. The name was changed in 1956 at the request of the

NAACP The National Association for the Advancement of Colored People (NAACP) is an American civil rights organization formed in 1909 as an interracial endeavor to advance justice for African Americans by a group including W. E. B. Du&nbs ...

. On a small turnout is a monument to Gregory Pacheco and a good view to the north. According to a plaque at the monument, pictured below, Gregory Pacheco was a firefighter who died in the La Jolla Fire in 1999. The descent on the eastern side of Palomar Mountain offers panoramic views of

. File:Sandiegocountys7d.jpg, East end on Highway 76 File:Lakehenshaw lookout.jpg, Lake Henshaw from lookout on County Highway S7 File:Sandiegocountys7b.jpg, Gregory Pacheco monument File:Sandiegocountys7c.jpg, Gregory Pacheco monument File:Sandiegocountys7a.jpg, West end at entrance to Palomar Mountain State Park ;Major intersections

S8

County Route S8 (CR S8) is a

, mostly along Lomas Santa Fe Drive and Linea Del Cielo, in

, United States. Its western end is CR S21 (locally signed as "Highway 101") in

Solana Beach Solana Beach (''Solana'', Spanish for "sunny side") is a beach city in San Diego County, California, on the South Coast. Its population was at 12,940 at the 2020 U.S. census, up from 12,867 at the 2010 census. History The area was first set ...

and its eastern end is at Via De La Valle in

. ;Route description The route begins in Solana Beach at Old Highway 101. It winds eastward through

, crossing through

and unincorporated San Diego County, and ends at Via De La Valle (CR S6) in Rancho Santa Fe. The last portion of the county road passes through Rancho Santa Fe on Paseo Delicias. ;Major intersections

S9

County Route S9 (CR S9), mostly known as Encinitas Boulevard, is a road in

, United States. Its west end is at CR S21 (Coast Highway 101) in

Encinitas Encinitas (Spanish language, Spanish for "Small Oaks") is a beach city in the North County (San Diego area), North County area of San Diego County, California, United States. Located in Southern California, it is approximately north of San Di ...

and its east end is at Paseo Delicias (CR S6) in

. Once outside Encinitas, the county route follows portions of Rancho Santa Fe Road, La Bajada, Los Morros, and La Granada, before terminating at Paseo Delicias. ;Major intersections

S10

County Route S10 (CR S10), known entirely as Rancho Santa Fe Road, is a road in

, United States, that runs through the

North County North County is a region in the northern area of San Diego County, California. It is the second-most populous region in the county (after San Diego), with an estimated population of 869,322. North County is well known for its affluence, especially ...

region of San Diego County. ;Route description CR S10 begins at Encinitas Boulevard in

, heading in a generally northward direction. It enters Carlsbad and turns eastward. This road travels into San Marcos and passes near the unincorporated area of Lake San Marcos. (The entire run of the road past Carlsbad is located in parts of the incorporated city of San Marcos; often, at this point, the incorporated portions only follow the road, leaving unincorporated islands nearby). Rancho Santa Fe Road intersects with San Marcos Boulevard and continues northward. There is a junction with State Route 78. A short distance north, Rancho Santa Fe ends at County Route S14 (which changes names from Santa Fe Avenue to Mission Road at the intersection). ;Major intersections

S11

County Route S11 (CR S11), known entirely as El Camino Real, is a

county route A county highway (also county road or county route; usually abbreviated CH or CR) is a road in the United States and in the Canadian province of Ontario that is designated and/or maintained by the County (United States), county highway departm ...

, United States. It runs through the

region in San Diego County, from Encinitas Boulevard ( County Route S9) in

to State Route 78 in

Oceanside Oceanside may refer to: Places United States *Oceanside, California ** Oceanside Transit Center *Oceanside, New York Oceanside is a Hamlet (New York), hamlet and census-designated place (CDP) located in the southern part of the town of Hempst ...

. As its street name implies, it is part of the 600-mile (965-kilometer) commemorative route connecting the 21

Spanish missions in California The Spanish missions in California () formed a List of Spanish missions in California, series of 21 religious outposts or missions established between 1769 and 1833 in what is now the U.S. state of California. The missions were established by ...

(formerly

Alta California Alta California (, ), also known as Nueva California () among other names, was a province of New Spain formally established in 1804. Along with the Baja California peninsula, it had previously comprised the province of , but was made a separat ...

). ;Route description CR S11's southern terminus is Encinitas Boulevard ( CR S9) in

. It continues northward through Encinitas, intersecting with Lecuadia Boulevard/Olivenhain Road, which leads to CR S10 (Rancho Santa Fe Road) east of this intersection. After this point, it enters Carlsbad, where it intersects with Palomar Airport Road ( CR S12). It continues northward through Carlsbad, ending at State Route 78 in

. Note that El Camino Real continues for several miles beyond both termini. It extends southward through Encinitas until it reaches

San Elijo Lagoon San Elijo Lagoon Ecological Reserve is one of the largest remaining coastal wetlands in San Diego County, California, United States. History Native American tribes hunted and gathered along the shores of the estuary at least 8,500 years before ...

and ends at Manchester Avenue. An unconnected road further east also called El Camino Real starts at the San Elijo Lagoon and continues south for several miles until Carmel Mountain Road. Northward in Oceanside, El Camino Real passes under State Route 76 and ends just north at Douglas Drive. ;Major intersections

S12

County Route S12 (CR S12), also known as Palomar Airport Road, San Marcos Boulevard, Twin Oaks Valley Road, and Deer Springs Road, is a

, United States. It runs through the

region of San Diego County from Carlsbad Boulevard ( County Route S21) in

Carlsbad Carlsbad may refer to: Geographical locations * Carlsbad, California, San Diego County, United States ** Carlsbad Santa Fe Depot, NRHP ID No. 93001016 * Carlsbad, New Mexico, United States ** Carlsbad Caverns National Park ** Carlsbad Irriga ...

near Hidden Meadows. ;Route description CR S12's western terminus is at Carlsbad Boulevard ( CR S21) in

. Almost immediately after it begins, CR S12 (this portion of which is called Palomar Airport Road) intersects with

. It passes Legoland California and continues eastward, passing its namesake,

McClellan–Palomar Airport McClellan–Palomar Airport (Palomar Airport) is a public airport southeast of Carlsbad in San Diego County, California. It is owned by the County of San Diego. The airport is used for both general and commercial aviation. As of March 2013, t ...

. It intersects with El Camino Real ( CR S11) before running through a number of industrial and business parks. Eventually, CR S12 enters San Marcos, where it becomes San Marcos Boulevard after an intersection with Business Park Drive. San Marcos Boulevard intersects Rancho Santa Fe Road ( CR S10) and continues eastward, crossing State Route 78. Shortly thereafter, San Marcos Boulevard intersects with Twin Oaks Valley Road, which assumes the S12 designation after this junction. Shortly after becoming CR S12, Twin Oaks Valley Road passes over Mission Road ( CR S14) without actually intersecting it, then continues to the northern city limits of San Marcos. At the edge of the city, Twin Oaks Valley Road narrows into a private road, and CR S12 bears right to become Deer Springs Road, which continues northward through unincorporated land. Eventually the road turns east, and CR S12 ends at an interchange with

, though the road itself continues as Mountain Meadow Road through Hidden Meadows. The route was established in 1961. ;Major intersections

S13

County Route S13 (CR S13), also known as Vista Village Drive, East Vista Way, and Mission Road, is a

, United States, that runs through the

region of San Diego County. It is distinctive for having a three-mile (5 km) discontinuity in Bonsall. ;Route description CR S13's southern terminus is at State Route 78 in

Vista Vista may refer to: Software *Windows Vista, the line of Microsoft Windows client operating systems released in 2006 and 2007 * VistA, (Veterans Health Information Systems and Technology Architecture) a medical records system of the United States ...

, where the street is known as Vista Village Drive. This section of CR S13 is the northern boundary of the newly renovated downtown area of Vista, and in this area the road intersects with Santa Fe Avenue, which is CR S14. Shortly afterwards, the road's name changes to East Vista Way, and continues northward outside the city limits into the unincorporated community of Bonsall. CR S13 is unusual in that, according to official legislation, its route is discontinuous. In Bonsall, East Vista Way meets State Route 76 and, from this point, loses its status as CR S13. Nearly three miles northeast on SR 76, CR S13 begins again, continuing northward, but as South Mission Road. Mission Road cuts north through Bonsall and passes the neighborhoods of San Luis Rey Heights and Winterwarm before entering Fallbrook. In Fallbrook, South Mission Road splits off into South Main Avenue, which carries the S13 signage. These two streets run parallel to each other for several blocks; East Fallbrook Road ( SR S15) begins at Mission and intersects Main. After a short distance, Mission turns east, intersecting Main; Mission then continues as S13. CR S13 continues eastward, ending at an interchange with

. Almost all of S13, except for later realigned portions, is an old alignment of U.S. Route 395, and Historic Route signs are posted in unincorporated areas. The route was established in 1968. ;Major intersections

S14

County Route S14 (CR S14), also known as Santa Fe Avenue, Mission Road, and Mission Avenue, is a

, United States, that runs through the

region of San Diego County. It runs from State Route 76 in

to Centre City Parkway in Escondido. ;Route description CR S14's western terminus is at State Route 76 in

, where it is known as North Santa Fe Avenue. It travels into

, becoming South Santa Fe Avenue before intersecting with County Route S13, or Vista Village Drive, in downtown Vista. At this point it begins to run parallel to State Route 78, which it does until its terminus. Santa Fe travels into western San Marcos, where it intersects with County Route S10 (Rancho Santa Fe Road); it is at this intersection that Santa Fe becomes Mission Road. Mission continues through San Marcos, passing under Twin Oaks Valley Road ( County Route S12) without an intersection. In eastern San Marcos, Mission Road crosses State Route 78 without an interchange and becomes Mission Avenue. Shortly afterward, it enters Escondido, where it crosses

, again with no interchange. Shortly after this point, the freeway portion of SR 78 ends and that route turns right onto Broadway, but CR S14's eastern terminus is at Centre City Parkway, a few blocks short from Broadway. CR S14 east of CR S13, except for later realigned portions, is an old alignment of U.S. Route 395, and Historic Route signs are posted in unincorporated areas. The route was established in 1968. ;Major intersections

S15

County Route S15 (CR S15) is a

, United States. It runs from County Route S13 (Mission Road) in Fallbrook to Old Highway 395. ;Route description CR S15's western terminus is at CR S13, also known as Mission Road, in Fallbrook. It begins as East Fallbrook Street. At the intersection with South Stage Coach Lane, CR S15 continues south to the intersection with Reche Road, at which point CR S15 again heads east. CR S15 continues east as Reche Road until it reaches its eastern terminus at the intersection with Old Highway 395, adjacent to Interstate 15. The route was established in 1959. ;Major intersections

S16

County Route S16 (CR S16), also known as Pala-Temecula Road, Pala Road, and Pechanga Parkway, is a

and Riverside counties in California, United States. It runs from its south end at State Route 76 on the

Pala Indian Reservation The Pala Indian Reservation is located in the middle of San Luis Rey River Valley in northern San Diego County, California, east of the community of Fallbrook, and has been assigned feature ID 272502. Historic variant names used to describe the ...

to its north end at State Route 79 (Temecula Parkway) in

Temecula Temecula (; , ; Luiseño: ''Temeekunga'') is a city in southwestern Riverside County, California, United States. The city had a population of 110,003 as of the 2020 census and was incorporated on December 1, 1989. The city is a tourist and ...

. ;Route description The route's southern terminus is at SR 76 on the

, in the San Luis Rey River Valley, near the community of

Pala Pala may refer to: Places Chad *Pala, Chad, the capital of the region of Mayo-Kebbi Ouest Estonia * Pala, Kose Parish, village in Kose Parish, Harju County * Pala, Kuusalu Parish, village in Kuusalu Parish, Harju County * Pala, Järva County, ...

. It twists through a short but rugged and steep mountain range and continues northward as Pala-Temecula Road through rural

. When it crosses the

Riverside County Riverside County is a county located in the southern portion of the U.S. state of California. As of the 2020 census, its population was 2,418,185, making it the fourth-most populous county in California and the 10th-most populous in the Unit ...

line and enters the

Pechanga Indian Reservation The Pechanga Band of Indians, also known as ''Payómkawichum'' (the People of the West), stand as 1 of 6 federally recognized tribes of Luiseño Indians, currently located in Riverside County, California. The modern understanding of the tribe, P ...

, it becomes Pala Road. Shortly thereafter, County Route S16 widens to four lanes as it reaches the city limits of

, where it becomes Pechanga Parkway. Near the

Pechanga Resort & Casino Pechanga Resort Casino is a Native American casino and integrated resort on the Pechanga Indian Reservation adjacent to the city of Temecula, California. It is one of the largest casino/resorts in the United States, with more than 5,400 slot m ...

, Pechanga Parkway becomes a six-lane arterial road and continues along several large suburban neighborhoods before ending at a T intersection with SR 79 (Temecula Parkway). The portion of County Route S16 known as Pechanga Parkway, as well as the portion of SR 79 known as Temecula Parkway, are unsigned because the City of Temecula maintains jurisdiction over both segments. The route was established in 1959. ;Major intersections

S17

County Route S17 (CR S17) is a

, United States. It runs from

Chula Vista Chula Vista ( ; , ) is a city in San Diego County, California, United States. It is the second-most populous city in the San Diego metropolitan area, the seventh-most populous city in Southern California, the 15th-most populous city in the ...

El Cajon El Cajon ( , ; Spanish: El Cajón, lit. 'the box') is a city in San Diego County, California, United States, east of downtown San Diego. The city takes its name from Rancho El Cajón, which was named for the box-like shape of the valley tha ...

. The route consists of portions of several roads passing through the cities of Chula Vista and El Cajon, and the unincorporated communities of Bonita, Spring Valley, and Rancho San Diego. County Route S17 roughly parallels State Route 54 from

east to State Route 125, running along E Street, Bonita Road, Sweetwater Road, South Worthington Street, and Paradise Valley Road. The route then shares the same alignment as State Route 54, from State Route 125 northeast to the El Cajon city limit, running along Jamacha Boulevard, Campo Road, and Jamacha Road. Within El Cajon, CR S17 shares the same alignment as the former State Route 54, continuing north to

along Jamacha Road and 2nd Street. The portions of County Route S17 within the cities of Chula Vista and El Cajon are no longer signed. The portions of the route within Bonita and Spring Valley are signed. However, all signs in Rancho San Diego (along Campo and Jamacha Roads) appear to have been removed except for the one heading east coming from the terminus of the freeway portion of State Route 94. In El Cajon city limits, the route is signed with Business Route 54. The route was established in 1964. ;Major intersections

S18

County Route S18 (CR S18) is a

Orange County, California Orange County (officially the County of Orange; often initialized O.C.) is a county (United States), county located in the Los Angeles metropolitan area in Southern California, United States. As of the 2020 United States census, the population ...

, United States. The route follows El Toro Road and Santiago Canyon Road which proceeds in a

boomerang A boomerang () is a thrown tool typically constructed with airfoil sections and designed to spin about an axis perpendicular to the direction of its flight, designed to return to the thrower. The origin of the word is from Australian Aborigin ...

-like pattern from State Route 133 in

Laguna Beach Laguna Beach (; ''Laguna'', Spanish for "Lagoon") is a city in Orange County, California, United States. Located in Southern California along the Pacific Ocean, this seaside resort city has a mild year-round climate, scenic coves, and environ ...

to State Route 55 near

. CR S18 traverses as a loop around the urban areas of Orange County and cuts through the

Santa Ana Mountains The Santa Ana Mountains are a short peninsular mountain range along the coast of Southern California in the United States. They extend for approximately southeast of the Los Angeles Basin largely along the border between Orange and Riversid ...

. The road is one of four county routes in Orange County that are signed in areas nearby the route, such as southbound

and southbound State Route 133. It is also noted to be the longest county route in Orange County and is the only major route that allows motorists to drive through, in, and out of the Santa Ana Mountains. El Toro Road

The Santiago Canyon Road portion of CR S18 in the Santa Ana Mountains is planned to become designated as an official scenic highway as part of the State Scenic Highway System. This makes it the second highway to become designated as a scenic road in

, despite the impact from the Santiago Fire as part of the wildfires in October 2007. Old El Toro Road Underpass

;Major intersections

S19

County Route S19 (CR S19) is a

in the U.S. state of California in Orange County. The route follows Live Oak Canyon Road from O'Neill Park to El Toro Road (S18) to

Trabuco Canyon Trabuco Canyon (''Trabuco'', Spanish for "Blunderbuss") is a small unincorporated community and census-designated place (CDP) located in the foothills of the Santa Ana Mountains in eastern Orange County, California, and lies partly within the Cl ...

. County Route S19 is notorious for many fatal accidents that have occurred in the recent years since 2000, and many lost lives due to such accidents. The route was established in 1961. ;Major intersections

S20

County Route S20 (CR S20) was a

in the U.S. state of

California California () is a U.S. state, state in the Western United States that lies on the West Coast of the United States, Pacific Coast. It borders Oregon to the north, Nevada and Arizona to the east, and shares Mexico–United States border, an ...

. As the only county route in

Santa Barbara County Santa Barbara County, officially the County of Santa Barbara (), is a county located in Southern California. As of the 2020 United States census, the population was 448,229. The county seat is Santa Barbara, and the largest city is Santa M ...

at the time, it was merged with State Route 1 in 1988, rerouting SR 1 from Harris Grade Road to the former county route leading into

Vandenberg Air Force Base Vandenberg may refer to: * Vandenberg (surname), including a list of people with the name * USNS ''General Hoyt S. Vandenberg'' (T-AGM-10), transport ship in the United States Navy, sank as an artificial reef in Key West, Florida * Vandenberg S ...

S21

County Route S21 (CR S21) is a south–north running road serving the coastal communities of northern

, United States, running from San Diego in the south to

in the north. The route is signed in many places as "Historic Route 101" with the official Historic U.S. 101 shields. CR S21 follows the prior alignment of

U.S. Route 101 U.S. Route 101, or U.S. Highway 101 (US 101), is a major north–south highway that traverses the states of California, Oregon, and Washington on the West Coast of the United States. It is part of the United States Numbered Highway Syst ...

through this region. The route is also called "Coast Highway" in some places as well. This route was originally designated in 1968 and is long. ;Route description County Route S21 begins at

in the north of San Diego as Genesee Avenue. After proceeding west-northwest for 3/4 mile (1.2 km) it intersects Torrey Pines Road and continues north with that name, providing access to Torrey Pines State Natural Reserve. The road then travels north into Del Mar, where it is renamed "Camino Del Mar". While in Del Mar the route passes both the historic Del Mar Racetrack and through the historic downtown of Del Mar. In

the route moves closer to the coast. Along this stretch, it is named "Highway 101" and the city has signed the route along its length with faux U.S. Highway shields that resemble the official U.S. 101 shields in use today along with the state issued Historic 101 shield. While to the north in

the route's name becomes "Coast Highway 101" also in homage to the old U.S. Route. In

it becomes "Carlsbad Boulevard”. The route is named "Coast Highway" in Oceanside, and comes to an end at Interstate 5 just south of Camp Pendleton. The section of this road between La Costa Avenue and Palomar Airport Road was once known as th
Oceanside-Carlsbad Freeway
The majority of the route from the Del Mar city limits to State Route 76 in Oceanside is signed as Historic U.S. 101, and is also an unsigned Business Route Interstate 5. ;Major intersections

S22

County Route S22 (CR S22) is a

and Imperial counties in California, United States. It runs from San Felipe Road (County Route S2 (California), County Route S2) west of Ranchita, California, Ranchita to California State Route 86, State Route 86 in Salton City, California, Salton City. The route is known as Montezuma Valley Road, Palm Canyon Drive, Christmas Circle, Peg Leg Road, and Borrego Salton Sea Way. ;Route description The route begins at a junction with County Route S2 (California), County Route S2 (San Felipe Road) in San Diego County and runs eastward as Montezuma Valley Road through the rural community of Ranchita, California, Ranchita. It enters

and then descends for approximately to the desert community of

, offering magnificent views of the Borrego Valley as it winds steeply down Montezuma Grade. As it enters Borrego Springs, the highway turns right onto Palm Canyon Drive. In the middle of Borrego Springs, it passes through Christmas Circle, the only large traffic circle in San Diego County. It continues east, turns north onto Peg Leg Road, and turns east again onto Borrego Salton Sea Way. CR S22 enters Imperial County, runs through Anza-Borrego Desert State Park again and ends at a junction with California State Route 86, State Route 86 in Salton City, California, Salton City, a community on the shore of the Salton Sea. The route was established in 1968. ;Major intersections

S24

County Route S24 (CR S24) is a

in southeast Imperial County, California, United States. It is north of, across the Colorado River and adjacent to Yuma, Arizona, serving the community of Winterhaven, California, Winterhaven. The southern two-thirds of the route travels through the Quechan, Quechan Indian Tribal lands of the Fort Yuma Indian Reservation. ;Route description LagunaDiversionDam01

The route begins from Winterhaven, California, Winterhaven, adjacent to the eastern exit of

at Winterhaven. The route travels northeast through portions of eastern Winterhaven, then immediately turns north through farmland, for ; (the continuation north exiting this route accesses the southern Chocolate Mountains, the western perimeter of the Little Picacho Wilderness, and Picacho State Recreation Area, a dirt road, sometimes rugged, wash-boarded and difficult). The route turns east past Ross Corner, then north, east, then north on a newly paved stretch through farmland in the Bard, California, Bard area for . The final turn east is through farmland for then a northeast stretch along the western shoreline of the Colorado River, Laguna Dam and a terminus at the turn-off to Imperial Dam; the river stretch is about , and seasonally has osprey, phainopepla, Abert's towhee, belted kingfisher, double-crested cormorant, and everpresent Gambel's quail, plus numerous other bird species, including the water birds. Of note, the osprey have snag (ecology), snag perches along the river route, and can be seen eating fish on pole tops, towers, etc. The terminus at the Laguna Dam turn-off transitions into the extension westwards in southwest Arizona from U.S. 95, U.S. 95 in Arizona, westwards on Imperial Dam Road of Yuma County, Arizona and the US Army Yuma Proving Ground. No traffic lights occur on the route. Only one stop sign is encountered while traveling north to south; that one 4-way stop is encountered at about 1.7 miles north of Winterhaven. south of the Imperial Dam entrance, the Ferguson Lake Road and the Senator Wash access exits to the northwest. The eastern access points to the Little Picacho Wilderness can be found along the northern sections of Ferguson Lake Road (a sometimes rugged, wash-boarded dirt road). The route was established in 1970. CR S24 serves as a second access route to the Yuma Proving Ground, and also to the main housing and Management, administration center of YPG. The route is also the main access to the housing facilities in the Imperial Dam region, administered by the Bureau of Land Management; the Imperial Dam housing region is on the Arizona side of the Colorado River. ;Major intersections

S25

County Route S25 (CR S25), commonly known as Chapman Avenue, is a 4.5 mile stretch of road in Orange, California, United States, that primarily travels east-west. The western terminus of the route is at an interchange with State Route 55, which leads to the remainder of Chapman Avenue, a street that bisects Old Towne, Orange Historic District, Old Towne Orange and travels all the way to the Anaheim Resort district. The eastern terminus is in the more rural Orange Park Acres, California, Orange Park Acres neighborhood near Santiago Canyon College and connects to County Route S18, known as Santiago Canyon Road. CR S25 was formerly a part of Legislative route, LRN 182, a route designated in 1933. ;Major intersections

S26

County Route S26 (CR S26) is a

in Imperial County, California, United States. It runs from State Route 78 / California State Route 86, State Route 86 in Westmorland, California, Westmorland to California State Route 115, State Route 115 northeast of Brawley, California, Brawley. Portions of the route are known as Borats Road, Kalin Road and Rutherford Road. ;Major intersections

S27

County Route S27 (CR S27) is a

in Imperial County, California, United States. It runs from Forrester Road (County Route S30 (California), CR S30) to Highline Road (County Route S33 (California), CR S33). Most of the route is known as Keystone Road, with a small portion of McConnell Road connecting the two segments of Keystone Road. ;Major intersections

S28

County Route S28 (CR S28) is a

in Imperial County, California, United States. It runs from Forrester Road (County Route S30 (California), CR S30) to Holt Road (County Route S32 (California), CR S32). Most of the route is known as Worthington Road, while the portion within the city of Imperial, California, Imperial is known as Barioni Boulevard. ;Major intersections

S29

County Route S29 (CR S29), known entirely as Drew Road, is a

in Imperial County, California, United States. It runs from State Route 98 west of Mount Signal, California, Mount Signal and north of the Mexico–United States border, U.S.-Mexico border to Evan Hewes Highway (County Route S80 (California), CR S80) in Seeley, California, Seeley. ;Major intersections

S30

County Route S30 (CR S30) is a

in Imperial County, California, United States. It runs from State Route 98 in Mount Signal, California, Mount Signal, north of the Mexico–United States border, U.S.-Mexico border, to Sorenson Avenue (California State Route 111, State Route 111) in Calipatria, California, Calipatria. The route is known as Brockman Road, McCabe Road, Forrester Road, Center Street in Westmorland, California, Westmorland, Walker Road, Gentry Road, Eddins Road, and Main Street in Calipatria. ;Major intersections

S31

County Route S31 (CR S31) is a

in Imperial County, California, United States. It runs from State Route 98 near Calexico, California, Calexico, north of the Mexico–United States border, U.S.-Mexico border, to Main Street (former State Route 78) in Brawley, California, Brawley. Most of the route is known as Dogwood Road (although it is sometimes signed as Dogwood Avenue in El Centro, California, El Centro). In Brawley, it is known as Imperial Avenue and Plaza Street. ;Major intersections

S32

County Route S32 (CR S32) is a

in Imperial County, California, United States. It runs from

and California State Route 7, State Route 7 south of Holtville, California, Holtville to State Route 78 east of Brawley, California, Brawley. The route is known as Orchard Road, Holt Road, and small segments of Gonder Road and Butters Road. In Holtville, it is known as Cedar Avenue and Holt Avenue. ;Major intersections

S33

County Route S33 (CR S33) is a

in Imperial County, California, United States. It runs from State Route 98 east of Bonds Corner, California, Bonds Corner, north of the Mexico–United States border, U.S.-Mexico border, to State Route 78 east of Brawley, California, Brawley. The route is known as Bonesteele Road, Kumberg Road, Miller Road, Kavanaugh Road, Highline Road, Gonder Road, and Green Road. ;Major intersections

S34

County Route S34 (CR S34), known entirely as Ogilby Road, is a

in Imperial County, California, United States. It runs from

near Felicity, California, Felicity and west of Yuma, Arizona to the State Route 78 portion between Blythe, California, Blythe and Brawley, California, Brawley. Located in the Yuma Desert and close to the Algodones Dunes, the road also goes through the ghost town of Ogilby, California, Ogilby. ;Major intersections

S78

County Route S78 (CR S78) was a

in Imperial County, California, United States. It is the former routing of the present-day State Route 78 portion between the south junction of California State Route 115, State Route 115 and the small community of Palo Verde, California, Palo Verde.

S80

County Route S80 (CR S80) is a

in Imperial County, California, United States. It was once a portion of U.S. Route 80 in California, U.S. Route 80, which no longer enters the state. CR S80 travels through Imperial County for to the vicinity of the Colorado River near Yuma, Arizona. Most of the route is known as Evan Hewes Highway, while the portion of the route within El Centro, California, El Centro is known as Adams Avenue, 4th Street, and Main Street. ;Route description S80ElCentro

CR S80 begins in the west at the junction of County Route S2 (California), CR S2 (Imperial Highway) as the Evan Hewes Highway roughly paralleling the routing of

. This portion of the highway travels east through Plaster City, California, Plaster City, Dixieland, California, Dixieland and Seeley, California, Seeley to El Centro, California, El Centro. In downtown El Centro, CR S80 becomes Adams Avenue. At Imperial Avenue, CR S80 junctions with California State Route 86, State Route 86 from the north and Interstate 8#El Centro business loop, Business Loop I-8 from the south. The roads run concurrent down Adams Avenue, and all three turn south along 4th Street. CR S80 then turns to the east along Main Street which takes it out of El Centro while SR 86 and Business I-8 continue south. Outside of El Centro after its junction with County Route S31 (California), CR S31 (Dogwood Road), CR S80 resumes the designation of Evan Hewes Highway. CR S80 also intersects California State Route 111, State Route 111 along this stretch. S80 continues east until it reaches its terminus at the junction with California State Route 115, State Route 115. State Route 115 continues along the Evan Hewes Highway and old U.S. Route 80. ;History U.S. Route 80 was deleted from California legislatively in 1964, though it would be another ten years before all the U.S. Numbered Highways, U.S. Highway signage was removed from the route. CR S80 was defined in 1973 shortly before the last Route 80 signs had been taken down. In 2006, the California State Legislature, California legislature, as part of concurrent resolution ACR 123, made the former Route 80, including County Route S80, an official historic route. For the short distance CR S80 runs concurrent with SR 86, it is part of the

. This trail runs along the route Juan Bautista de Anza took along his expedition into California from 1775–76. Evan Hewes was the former superintendent of the Imperial Irrigation District.https://cdnc.ucr.edu/?a=d&d=CC19580107.2.17&e=-------en--20--1--txt-txIN-------- ;Major intersections

References

{{DEFAULTSORT:California County Routes In Zone S County routes in California, S*

S1

S2

S3

S4

S5

S6

S7

S8

S9

S10

S11

S12

S13

S14

S15

S16

S17

S18

S19

S20

S21

S22

S24

S25

S26

S27

S28

S29

S30

S31

S32

S33

S34

S78

S80

See also

References