The Catskill Mountains, also known as the Catskills, are a
physiographic province and
subrange of the larger
Appalachian Mountains
The Appalachian Mountains, often called the Appalachians, are a mountain range in eastern to northeastern North America. The term "Appalachian" refers to several different regions associated with the mountain range, and its surrounding terrain ...
, located in southeastern
New York. As a cultural and geographic region, the Catskills are generally defined as those areas close to or within the borders of the
Catskill Park, a
forest preserve protected from many forms of development under New York state law.
Geologically, the Catskills are a mature
dissected plateau
A dissected plateau is a plateau area that has been severely eroded, and the relief is sharp. Such an area may be referred to as mountainous, but dissected plateaus are distinguishable from orogenic mountain belts by the lack of fold (geology), ...
, a flat region subsequently uplifted and eroded into sharp
relief
Relief is a sculpture, sculptural method in which the sculpted pieces remain attached to a solid background of the same material. The term ''wikt:relief, relief'' is from the Latin verb , to raise (). To create a sculpture in relief is to give ...
by watercourses. The Catskills form the northeastern end of the
Allegheny Plateau (also known as the
Appalachian Plateau).
The Catskills were named by early Dutch settlers. They are well known in American society as the setting for films and works of art, including many 19th-century
Hudson River School paintings, as well as for being a favored destination for vacationers from
New York City
New York, often called New York City (NYC), is the most populous city in the United States, located at the southern tip of New York State on one of the world's largest natural harbors. The city comprises five boroughs, each coextensive w ...
in the mid-20th century. The region's many large resorts gave many young
stand-up comedians an opportunity to hone their craft. Since the late 19th century, the Catskills have been a haven for artists, musicians and writers, especially in and around the towns of
Woodstock and
Phoenicia.
History
Etymology
Nicolaes Visscher I's 1656 map of
New Netherland located the ' at the mouth of
Catskill Creek. The region to the south is identified as ' (High Lands of the
Esopus), a reference to a local band of northern
Lenape
The Lenape (, , ; ), also called the Lenni Lenape and Delaware people, are an Indigenous peoples of the Northeastern Woodlands, Indigenous people of the Northeastern Woodlands, who live in the United States and Canada.
The Lenape's historica ...
Native Americans who inhabited the banks of the Hudson and hunted in the highlands along the
Esopus Creek.
While the meaning of the name ("cat creek
kill''">kill_(body_of_water).html" ;"title="'kill (body of water)">kill'' in Dutch language">Dutch) and the namer (early Dutch explorers) are settled matters, how and why the area is named "Catskills" is a mystery. Mountain lions (catamounts) were known to have been in the area when the Dutch arrived in the 17th century and may have been a reason for the name.
The confusion over the origins of the name led over the years to variant spellings such as ''Kaatskill'' and ''Kaaterskill'', both of which are also still used: the former in the regional magazine ''
Kaatskill Life'', the latter as the name of a
mountain peak and a
waterfall
A waterfall is any point in a river or stream where water flows over a vertical drop or a series of steep drops. Waterfalls also occur where meltwater drops over the edge
of a tabular iceberg or ice shelf.
Waterfalls can be formed in seve ...
.
Henry Schoolcraft is supposed to have coined the indigenous term for the range, ''On-ti-o-ra'' ("mountains/hills/land of the sky"), in 1844, due to the term not being attested prior to his record of it.
Geography
The Catskill Mountains are approximately north-northwest of
New York City
New York, often called New York City (NYC), is the most populous city in the United States, located at the southern tip of New York State on one of the world's largest natural harbors. The city comprises five boroughs, each coextensive w ...
and southwest of
Albany, starting west of the
Hudson River. The Catskills occupy much of two
counties (
Greene and
Ulster
Ulster (; or ; or ''Ulster'') is one of the four traditional or historic provinces of Ireland, Irish provinces. It is made up of nine Counties of Ireland, counties: six of these constitute Northern Ireland (a part of the United Kingdom); t ...
), and extend slightly into
Delaware
Delaware ( ) is a U.S. state, state in the Mid-Atlantic (United States), Mid-Atlantic and South Atlantic states, South Atlantic regions of the United States. It borders Maryland to its south and west, Pennsylvania to its north, New Jersey ...
,
Sullivan, and southwestern
Schoharie counties.
At the range's eastern end, the
mountain
A mountain is an elevated portion of the Earth's crust, generally with steep sides that show significant exposed bedrock. Although definitions vary, a mountain may differ from a plateau in having a limited summit area, and is usually higher t ...
s begin dramatically with the
Catskill Escarpment rising up suddenly from the
Hudson Valley
The Hudson Valley or Hudson River Valley comprises the valley of the Hudson River and its adjacent communities in the U.S. state of New York (state), New York. The region stretches from the Capital District (New York), Capital District includi ...
. The western boundary is far less certain, as the mountains gradually decline in height and grade into the rest of the
Allegheny Plateau, but maps from the 18th and 19th centuries consistently mark the border of the Catskill Mountains as the East Branch of the Delaware River, which is consistent with the actual topographic relief. The
Pocono Mountains, to the immediate southwest in
Pennsylvania
Pennsylvania, officially the Commonwealth of Pennsylvania, is a U.S. state, state spanning the Mid-Atlantic (United States), Mid-Atlantic, Northeastern United States, Northeastern, Appalachian, and Great Lakes region, Great Lakes regions o ...
, are also a part of the Allegheny Plateau.
The Catskills contain
more than 30 peaks above and parts of six important rivers. The
Catskill Mountain 3500 Club is an organization whose members have climbed all the peaks in the Catskills over . The highest mountain,
Slide Mountain in Ulster County, has an elevation of .

Climatically, the Catskills lie within the
Allegheny Highlands forests ecoregion.
Climate
According to the
Köppen climate classification
The Köppen climate classification divides Earth climates into five main climate groups, with each group being divided based on patterns of seasonal precipitation and temperature. The five main groups are ''A'' (tropical), ''B'' (arid), ''C'' (te ...
system, the Catskill Mountains have two climate zones. The vast majority of the Catskills have a warm summer humid continental climate (''Dfb'') with some isolated locations in valleys with hot summer humid continental climate (''Dfa''). The
plant hardiness zone on Slide Mountain at is 5a with an average annual extreme minimum temperature of . The plant hardiness zone in Margaretville at is 5b with an average annual extreme minimum temperature of .
Geology

Although the Catskills are sometimes compared with the
Adirondack Mountains farther north, the two mountain ranges are not geologically related, as the Adirondacks are a continuation of the
Canadian Shield. Similarly, the
Shawangunk Ridge, which forms the southeastern edge of the Catskills, is part of the geologically distinct
Ridge-and-Valley province and is a continuation of the same ridge known as
Kittatinny Mountain in New Jersey and
Blue Mountain in Pennsylvania.
The Catskill Mountains are more of a
dissected plateau
A dissected plateau is a plateau area that has been severely eroded, and the relief is sharp. Such an area may be referred to as mountainous, but dissected plateaus are distinguishable from orogenic mountain belts by the lack of fold (geology), ...
than a series of mountain ranges. The sediments that make up the rocks in the Catskills were deposited when the ancient
Acadian Mountains in the east were rising and subsequently eroding. The sediments traveled westward and formed a great delta into the sea that was in the area at that time. The escarpment of the Catskill Mountains is near the former (landward) edge of this delta, as the sediments deposited in the northeastern areas along the escarpment were deposited above sea level by moving rivers, and the Acadian Mountains were located roughly where the
Taconic Mountains are located today (though significantly larger). Finer sediment was deposited further westward, and thus the rocks change from gravel
conglomerates to
sandstone
Sandstone is a Clastic rock#Sedimentary clastic rocks, clastic sedimentary rock composed mainly of grain size, sand-sized (0.0625 to 2 mm) silicate mineral, silicate grains, Cementation (geology), cemented together by another mineral. Sand ...
and
shale. Further west, these fresh water deposits intermingle with shallow marine sandstone and shale until the end, in deeper water
limestone
Limestone is a type of carbonate rock, carbonate sedimentary rock which is the main source of the material Lime (material), lime. It is composed mostly of the minerals calcite and aragonite, which are different Polymorphism (materials science) ...
.
The uplift and erosion of the Acadian Mountains was occurring during the
Devonian
The Devonian ( ) is a period (geology), geologic period and system (stratigraphy), system of the Paleozoic era (geology), era during the Phanerozoic eon (geology), eon, spanning 60.3 million years from the end of the preceding Silurian per ...
and early
Mississippian period (395 to 325 million years ago). Over that time, thousands of feet of these sediments built up, slowly moving the Devonian seashore further west. A meteor impact occurred in the shallow sea approximately 375
mya, creating a diameter crater. This crater eventually filled with sediments and became
Panther Mountain through the process of uplift and erosion. By the middle of the Mississippian period, the uplift stopped, and the Acadian Mountains had been eroded so much that sediments no longer flowed across the Catskill Delta.

Over time, the sediments were buried by more sediments from other areas, until the original Devonian and Mississippian sediments were deeply buried and slowly became solid rock. Then the entire area experienced uplift, which caused the sedimentary rocks to begin to erode. Today, those upper sedimentary rocks have been completely removed, exposing the Devonian and Mississippian rocks. Today's Catskills are a result of the continued erosion of these rocks, both by streams and, in the recent past, by glaciers.
In successive
ice ages
An ice age is a long period of reduction in the temperature of Earth's surface and atmosphere, resulting in the presence or expansion of continental and polar ice sheets and alpine glaciers. Earth's climate alternates between ice ages, and Gre ...
, both valley and continental glaciers have widened the valleys and the notches of the Catskills and rounded the mountains. Grooves and scratches in exposed bedrock provide evidence of the great sheets of ice that once traversed the region. Even today the erosion of the mountains continues, with the region's rivers and streams deepening and widening the mountains' valleys and cloves.
Recreation
The Borscht Belt
In the mid–20th century, summer resorts in the Catskills, nicknamed the
Borscht Belt, were a major vacation destination for Jewish New Yorkers. At its peak of popularity, about 500 resorts operated in the region. Later changes in vacationing patterns have led most of those travelers elsewhere, although there are still some bungalow communities and summer camps in the region catering to
Orthodox populations.
Aquatic sports and recreation
Esopus Creek is a tributary of the
Hudson River, starting at
Winnisook Lake on
Slide Mountain. It flows across Ulster County to the Hudson River at
Saugerties. The Esopus is noted for making an almost 270-degree turn around
Panther Mountain, following a buried impact crater rim. It is famous for
tubing, a sport of rafting down a river in an inner tube. Many tubers begin their trip at
Phoenicia, New York, and head down the creek towards the Ashokan Reservoir at
Olive, New York.
The Ashokan Reservoir is part of the
New York City
New York, often called New York City (NYC), is the most populous city in the United States, located at the southern tip of New York State on one of the world's largest natural harbors. The city comprises five boroughs, each coextensive w ...
water supply system, with fishing allowed under permit, but ice fishing is prohibited. It is the most famous New York City-owned reservoir for
rainbow trout
The rainbow trout (''Oncorhynchus mykiss'') is a species of trout native to cold-water tributary, tributaries of the Pacific Ocean in North America and Asia. The steelhead (sometimes called steelhead trout) is an Fish migration#Classification, ...
.
River canoeing and kayaking are popular. There are 42 rapids ranging from
class I to V+.
The Esopus Creek is famous for its
fly fishing, although in recent years it has been plagued by
invasive plant
An invasive species is an introduced species that harms its new environment. Invasive species adversely affect habitats and bioregions, causing ecological, environmental, and/or economic damage. The term can also be used for native speci ...
s.
Cycling
Road and mountain biking are fairly popular in the range. Bicycle racing includes the Tour of the Catskills, a three-day road
stage race held in Green and Ulster counties each summer, and the UCI Mountain Bike World Cup in Windham. Other cycling resources include the
Catskill Scenic Trail, the Headwaters Trails in Stamford and the Roundtopia trail network (mapped by the
Round Top Mountain Bike Association). Several ski centers provide downhill mountain bicycling in the warmer months.
Hiking and camping
Within the range is the
Catskill Park, comprising over . Catskill Park is part of
New York's Forest Preserve. Not all the land is publicly owned; about 60% remains in private hands, but new sections are added frequently. Most of the park and the preserve are within Ulster County, with a significant portion in Greene County, and parts in Sullivan and Delaware counties as well. Many of the trails in public areas are maintained and updated by the
New York–New Jersey Trail Conference and the
Catskill Mountain 3500 Club.
Devil's Path is one of the many trails open for hikers. Spots to camp in the Catskills include Bear Spring Mountain, Little Pond, Mongaup Pond, and
North-South Lake.
Skiing
There are five main downhill ski and snowboard areas in the Catskills:
Belleayre Mountain (run by the
Olympic Regional Development Authority);
Hunter Mountain (the first ski area to install
snowmaking machines in New York);
Windham Mountain; Holiday Mountain Ski and Fun in
Monticello; and
Plattekill Mountain in
Roxbury.
Joppenbergh Mountain, in
Rosendale Village hosted its first
ski jumping
Ski jumping is a winter sport in which competitors aim to achieve the farthest jump after sliding down on their skis from a specially designed curved ramp. Along with jump length, competitor's aerial style and other factors also affect the final ...
competition in 1937. Ski jumping was continued on the mountain until February 7, 1971, when the last competition was held.
The Mountain Trails
Cross Country Ski Center in
Tannersville has of trails.
Structures
Fire towers
The Catskill Mountains
fire towers were constructed to facilitate
forest fire
A wildfire, forest fire, or a bushfire is an unplanned and uncontrolled fire in an area of combustible vegetation. Depending on the type of vegetation present, a wildfire may be more specifically identified as a bushfire ( in Australia), dese ...
prevention and control. Twenty-three fire towers were built in the Catskill Mountains between 1908 and 1950. The fire towers fell out of use by the 1970s as fire spotting from airplanes had become more effective and efficient, so the fire towers were decommissioned; the
Hunter Mountain Fire Tower was the last to be taken out of service in 1990.
Six remaining towers were renovated and opened to the public as observation posts with panoramic views and a tower was opened at the Catskill Visitor Center in 2022. In 2024 a tower was restored to
Bramley Mountain, bringing the count to eight. The current towers are:
*
Balsam Lake Mountain Fire Observation Station near
Hardenburgh, elevation
*
Hunter Mountain Fire Tower near
Hunter, elevation
*
Mt. Utsayantha Fire Tower near
Stamford, New York, elevation
*
Overlook Mountain Tower near Woodstock, elevation
*
Red Hill Fire Observation Station near
Denning, elevation
*
Mount Tremper Fire Observation Station near
Shandaken, elevation
*Upper Esopus Fire Observation Station near
Mount Tremper, elevation
*
Bramley Mountain Fire Tower near
Bloomville, elevation
Notable landmarks
The
Catskill Mountain House, built in 1824, was a hotel near
Palenville,
New York, in the Catskill Mountains overlooking the
Hudson River Valley. In its prime at the turn of the century, visitors included
United States Presidents Ulysses S. Grant,
Chester A. Arthur and
Theodore Roosevelt
Theodore Roosevelt Jr. (October 27, 1858 – January 6, 1919), also known as Teddy or T.R., was the 26th president of the United States, serving from 1901 to 1909. Roosevelt previously was involved in New York (state), New York politics, incl ...
.
Transportation
From 1872, the northern part of the Catskills were served by the Catskill Mountain Branch of the
Ulster and Delaware Railroad which was absorbed into the
New York Central railroad in 1932. Oneonta to Kingston passenger rail service continued until 1954. Part of the line still exists but now serves only freight.
The southern part of the Catskills was served by the
New York, Ontario and Western Railway. Over the course of 1950, service on the NYO&W downscaled to summer only. In its last years it ran trains from
Roscoe to
Weehawken, New Jersey, via
Liberty. It connected with the New York Central's
West Shore Railroad at
Cornwall
Cornwall (; or ) is a Ceremonial counties of England, ceremonial county in South West England. It is also one of the Celtic nations and the homeland of the Cornish people. The county is bordered by the Atlantic Ocean to the north and west, ...
. This service lasted until September 10, 1953.
The
Delaware and Ulster Railroad is a
heritage railroad, based in
Arkville, New York
Arkville is a hamlet in the Town of Middletown, Delaware County, New York, United States. It is located along New York State Route 28, one mile north of the village of Margaretville in the western Catskill Mountains. It has the ZIP code ...
, that still runs a scenic part of the track from Highmount to Hubbell Corners, New York, for tourist use. The
Catskill Mountain Railroad is also a heritage railroad in the Catskills, operating from
Kingston up to Highmount.

The Catskills are accessible by automobile from the east along
Interstate 87/
New York State Thruway, which runs north–south through the
Hudson Valley
The Hudson Valley or Hudson River Valley comprises the valley of the Hudson River and its adjacent communities in the U.S. state of New York (state), New York. The region stretches from the Capital District (New York), Capital District includi ...
. To the south and southwest, the Catskills are accessible by a variety of highways, including
New York State Route 55,
U.S. Route 44,
U.S. Route 209, and
New York State Route 17. Access to the western Catskills is provided by
New York State Route 30; and the vaguely defined far-western edge of the region is variously considered to be
New York State Route 10 or
Interstate 88, though this boundary remains a matter of local preference. New York State Routes
28 and
23A cut east–west through the heart of the Catskills, serving many of the most popular outdoor tourist destinations.
New York State Route 23 runs east–west across the Catskills' northern section.
Governor Kathy Hochul supports plans for the
New York State Department of Transportation
The New York State Department of Transportation'' (NYSDOT) is the department of the Government of New York (state), New York state government responsible for the development and operation of highways, Rail transport, railroads, mass transit sys ...
to improve highway transportation for New York State car drivers driving on
New York Route 17 in the New York Catskills Region. It will cost $1.3 billion.
Environmentalists and transportation planners do not like the plan.
The closest major airports to the Catskill region are
Albany International Airport to the north and
Stewart International Airport in Newburgh to the south. Smaller airports in the region include:
*
Columbia County Airport in
Hudson
*
Dutchess County Airport in
Poughkeepsie
*
Joseph Y. Resnick Airport in
Ellenville
*
Kingston–Ulster Airport
*
Kobelt Airport in
Wallkill
*
Randall Airport in
Middletown
*
Sullivan County International Airport in
Monticello
*
Wurtsboro–Sullivan County Airport
In popular culture
The Catskills serve as the setting for many works of fiction, such as the short story
Rip Van Winkle, and the children's book ''
My Side of the Mountain''. The Hudson Valley Film Commission maintains a list of films set in the Hudson Valley/Catskills Region. Of them, more than three dozen films are set in the Catskills.
The town of
Bethel, New York, located in the Catskills, was home to the famous
Woodstock music festival that took place August 15–18, 1969. The event, wherein 32 music acts performed in front of over 500,000 concert-goers, was captured in the documentary movie ''
Woodstock'' (1970). The site is now home to the world-renowned Bethel Woods Center for the Arts.
The many hotels and vacation resorts located in the Catskills are notable in American cultural history for their role in the development of modern
stand-up comedy
Stand-up comedy is a performance directed to a live audience, where the performer stands on a stage (theatre), stage and delivers humour, humorous and satire, satirical monologues sometimes incorporating physical comedy, physical acts. These ...
. Comedians such as
Rodney Dangerfield,
Jackie Mason,
Alan King, and
Don Rickles all got their start performing in Catskill hotel venues colloquially referred to as the
Borscht Belt.
File:Catskill Mountain House.jpg, ''View from The Mountain House'' (1836), painting by William Henry Bartlett
File:Paul Weber, Scene in the Catskills, 1858, NGA 176783.jpg, Paul Weber, ''Scene in the Catskills'', 1858
File:WLA lacma Sanford Robinson Gifford October in the Catskills 1880.jpg, ''October in the Catskills'', 1880 painting by Sanford Robinson Gifford
File:Asher Brown Durand - The Catskills - Walters 37122.jpg, '' The Catskills'', 1859 painting by Asher Brown Durand depicting the Catskills using the "sublime landscape" approach
File:Woodstock redmond stage.JPG, The Redmond Stage, Woodstock music festival, 1969
File:Wall, William Guy -Cauterskill Falls on the Catskill Mountains, Taken from under the Cavern, 1826-27.jpg, ''Kaaterskill Falls on the Catskill Mountains'' (1826–27), painting by William Guy Wall, Honolulu Museum of Art
See also
*
Helderberg Escarpment
*
List of subranges of the Appalachian Mountains
*
Resorts World Catskills
References
Further reading
*
*
*
*
*
*
*
*
External links
*
Hiking Guide to Catskill High Peaks��Catskill 3500 Club
List of Catskills peaks organized by hiking difficultyWebsite for the Catskill Mountain Club hikingThe Catskill Archive – History of the Catskill MountainsThe Catskill Mountain FoundationThe Catskill CenterThe Catskill Watershed CorporationCatskill Region Photo GalleryCatskill Mountainkeeper��Protecting the Six Counties of the Catskills
Catskill Mountain Businesses listed on Hudson Valley DirectorySullivan County Visitors Association
{{Authority control
Allegheny Plateau
Landforms of Delaware County, New York
Landforms of Greene County, New York
Landforms of Schoharie County, New York
Landforms of Sullivan County, New York
Landforms of Ulster County, New York
Mountain ranges of New York (state)
Physiographic regions of the United States
Regions of New York (state)
Subranges of the Appalachian Mountains
Tourist attractions in New York (state)
Upstate New York