Timpanogos Cave National Monument is a

United States National Monument In the United States, a national monument is a protected area that can be created from any land owned or controlled by the federal government by proclamation of the President of the United States or an act of Congress. National monuments prot ...

protecting the

Timpanogos Cave Historic District The Timpanogos Cave Historic District is an historic district in the Timpanogos Cave National Monument in American Fork Canyon in northeastern Utah County, Utah, United States, that is listed on the National Register of Historic Places (NRHP). ...

and a

cave A cave or cavern is a natural void in the ground, specifically a space large enough for a human to enter. Caves often form by the weathering of rock and often extend deep underground. The word ''cave'' can refer to smaller openings such as sea ...

system on

Mount Timpanogos Mount Timpanogos, often referred to as Timp, is the second-highest mountain in Utah's Wasatch Range. Timpanogos rises to an elevation of above sea level in the Uinta-Wasatch-Cache National Forest. With of topographic prominence, Timpanogos is ...

American Fork Canyon American Fork Canyon is a canyon in the Wasatch Mountains of Utah, United States. The canyon is famous for the Timpanogos Cave National Monument, which resides on its south side. It is named after the American Fork River, which runs through the ...

in the

Wasatch Range The Wasatch Range ( ) or Wasatch Mountains is a mountain range in the western United States that runs about from the Utah-Idaho border south to central Utah. It is the western edge of the greater Rocky Mountains, and the eastern edge of the G ...

, near

Highland Highlands or uplands are areas of high elevation such as a mountainous region, elevated mountainous plateau or high hills. Generally speaking, upland (or uplands) refers to ranges of hills, typically from up to while highland (or highlands) is ...

Utah Utah ( , ) is a state in the Mountain West subregion of the Western United States. Utah is a landlocked U.S. state bordered to its east by Colorado, to its northeast by Wyoming, to its north by Idaho, to its south by Arizona, and to its ...

, in the

United States The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country Continental United States, primarily located in North America. It consists of 50 U.S. state, states, a Washington, D.C., ...

. The site is managed by the

National Park Service The National Park Service (NPS) is an agency of the United States federal government within the U.S. Department of the Interior that manages all national parks, most national monuments, and other natural, historical, and recreational properti ...

. The trail to the cave is steep, gaining close to , but paved and fairly wide, making the caves accessible to most. The three caves of the system, one of which is specifically called Timpanogos Cave, are only viewable on guided tours when the monument is open, usually from May through September depending on snow conditions and funding. There is the standard tour going through the cave system, and an Introduction to Caving tour which teaches Leave No Trace caving and goes further into Hansen Cave.

Three caves

The three caves of the Monument that are tourable are: Hansen Cave, Middle Cave, and Timpanogos Cave. The three caves are connected by manmade tunnels blasted in the 1930s by the

Works Progress Administration The Works Progress Administration (WPA; renamed in 1939 as the Work Projects Administration) was an American New Deal agency that employed millions of jobseekers (mostly men who were not formally educated) to carry out public works projects, i ...

. The average temperature in the caves is 46 degrees Fahrenheit. Many colorful cave features or

speleothem A speleothem (; ) is a geological formation by mineral deposits that accumulate over time in natural caves. Speleothems most commonly form in calcareous caves due to carbonate dissolution reactions. They can take a variety of forms, dependi ...

s can be seen. Among the most interesting are the

helictite A helictite is a speleothem (cave-formed mineral) found in a limestone cave that changes its axis from the vertical at one or more stages during its growth. Helictites have a curving or angular form that looks as if they were grown in zero gra ...

s, which are hollowed, twisted, spiraling straws of deposited

calcite Calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (CaCO3). It is a very common mineral, particularly as a component of limestone. Calcite defines hardness 3 on the Mohs scale of mineral hardness, based on scratc ...

aragonite Aragonite is a carbonate mineral, one of the three most common naturally occurring crystal forms of calcium carbonate, (the other forms being the minerals calcite and vaterite). It is formed by biological and physical processes, including pre ...

. They are formed when water travels through the tube and then evaporates, leaving a trace mineral deposit at the end. Other

speleothems A speleothem (; ) is a geological formation by mineral deposits that accumulate over time in natural caves. Speleothems most commonly form in calcareous caves due to carbonate dissolution reactions. They can take a variety of forms, depending o ...

found in the cave include: cave bacon, cave columns,

flowstone Flowstones are sheetlike deposits of calcite or other carbonate minerals, formed where water flows down the walls or along the floors of a cave. They are typically found in "solution caves", in limestone, where they are the most common speleot ...

, cave popcorn, cave drapery,

stalactite A stalactite (, ; from the Greek 'stalaktos' ('dripping') via ''stalassein'' ('to drip') is a mineral formation that hangs from the ceiling of caves, hot springs, or man-made structures such as bridges and mines. Any material that is soluble ...

s and

stalagmite A stalagmite (, ; from the Greek , from , "dropping, trickling") is a type of rock formation that rises from the floor of a cave due to the accumulation of material deposited on the floor from ceiling drippings. Stalagmites are typicall ...

Discovery of the caves

Martin Hansen discovered what became known as Hansen Cave in October 1887, reportedly while cutting timber he tracked cougar footprints high up the side of American Fork Canyon. Many of the features and formations in this chamber were damaged or removed by the Duke Onyx Company and the general public before the cave was made a national monument. In 1913, a second cave was discovered nearby. While in the area to explore Hansen Cave with their families, James W. Gough and Frank Johnson were climbing an adjacent slope when they discovered the entrance to what is now known as Timpanogos Cave. Several others later entered the cave and viewed many of the formations inside, including the Great Heart of Timpanogos. However, before long knowledge of the cave and its entrance was lost. Some sources indicate that the entrance was lost due to a landslide in the area, while others say it was, in part, caused by the extreme secrecy of the original finders. Several years later, after hearing rumors of another cave, Vearl J Manwill came with a group of associates (which later became the Payson Alpine Club) in search of the mysterious hidden cave. On 14 February 1921 he rediscovered it (although many sources credit him as having discovered the cave). He immediately shared the information with the other members of the group. Having in mind the extreme damage that had resulted in Hansen Cave, that very night, the group dedicated themselves to the preservation of the cave. Of that night, Manwill wrote in his journal that they discussed ways "to preserve its beauty for posterity instead of allowing it to be vandalized as Hansen's Cave had been." Shortly thereafter they reported their find to the

US Forest Service The United States Forest Service (USFS) is an agency of the U.S. Department of Agriculture that administers the nation's 154 national forests and 20 national grasslands. The Forest Service manages of land. Major divisions of the agency in ...

. Later that fall, on 15 October 1921, George Heber Hansen and Wayne E. Hansen, Martin Hansen's son and grandson, were hunting on the other side of the canyon. While using binoculars to try to find deer, they came across another hole in the mountain, in between the other two caves. In a few days they came back, with 74-year-old Martin Hansen. Martin was the first to enter the cave, now called Middle Cave. Current tours of the cave system enter the caves though a manmade entrance very close to the entrance discovered by Martin Hansen. Passing through a manmade tunnel, tours continue on to Middle Cave, before passing through another manmade tunnel to Timpanogos Cave. Finally, tours return to the surface through a manmade exit near the original entrance.

Administration

Although the site was designated a

national monument A national monument is a monument constructed in order to commemorate something of importance to national heritage, such as a country's founding, independence, war, or the life and death of a historical figure. The term may also refer to a spe ...

on October 14, 1922, the site was initially developed and maintained by the

U.S. Forest Service The United States Forest Service (USFS) is an agency of the U.S. Department of Agriculture that administers the nation's 154 national forests and 20 national grasslands. The Forest Service manages of land. Major divisions of the agency inc ...

. The

took over management in 1933. A number of park structures were built by the

in the 1930s and early 1940s. The

was designated in 1982 to include these structures. Middle Cave and Timpanogos Cave were discovered in an era where their formations and resources could be protected. The National Park Service, which oversees and preserves the cave complex, has continued to develop new ways to retain its natural features, including limiting lighting in the caves to retard growth of invasive organisms. Preservation is a high priority. The resource management team at the monument is actively involved in protecting the cave and its surroundings. The National Park Service is continually monitoring and striving to determine a successful balance between visitor access and cave preservation. A limited number of people per tour was implemented to help lessen the human impacts in the caves. The National Park Service also balances preservation with the needs of the Monument's staff. The Monument's original visitor center burned down in 1991, and the visitor center was housed in a double wide trailer house for almost three decades. With the temporary visitor center in a dangerous rock-fall zone, plans for a new center came under consideration. Following the monument closing for the season in September 2018, construction began on the new trailhead and visitor center. The trail and monument reopened to the public in June 2019.

Geology

The cave system is located in the Deseret Limestone, a Mississippian age

limestone Limestone ( calcium carbonate ) is a type of carbonate sedimentary rock which is the main source of the material lime. It is composed mostly of the minerals calcite and aragonite, which are different crystal forms of . Limestone forms w ...

formed around 340 million years ago. Notably the cave cavity was formed initially by a series of faults running off of the Wasatch fault. Since that time

hydrothermal Hydrothermal circulation in its most general sense is the circulation of hot water (Ancient Greek ὕδωρ, ''water'',Liddell, H.G. & Scott, R. (1940). ''A Greek-English Lexicon. revised and augmented throughout by Sir Henry Stuart Jones. with th ...

water action perhaps similar to that of Cave of the Winds in

Colorado Colorado (, other variants) is a state in the Mountain West subregion of the Western United States. It encompasses most of the Southern Rocky Mountains, as well as the northeastern portion of the Colorado Plateau and the western edge of the ...

, and uplift of the

Wasatch Mountains The Wasatch Range ( ) or Wasatch Mountains is a mountain range in the western United States that runs about from the Utah-Idaho border south to central Utah. It is the western edge of the greater Rocky Mountains, and the eastern edge of the G ...

has formed the modern cave system. The

first started to form within the last 750,000 years, based on

paleomagnetism Paleomagnetism (or palaeomagnetismsee ), is the study of magnetic fields recorded in rocks, sediment, or archeological materials. Geophysicists who specialize in paleomagnetism are called ''paleomagnetists.'' Certain magnetic minerals in roc ...

iron Iron () is a chemical element with symbol Fe (from la, ferrum) and atomic number 26. It is a metal that belongs to the first transition series and group 8 of the periodic table. It is, by mass, the most common element on Earth, right in ...

deposits within the formations, as the cave system has been slowly lifted above the unnamed stream that flows though the canyon (and becomes the American Fork iverat the mouth of the canyon).

References

External links