East Mountain is a traprock mountain ridge located in the

Connecticut River Valley The Connecticut River is the longest river in the New England region of the United States, flowing roughly southward for through four states. It rises 300 yards (270 m) south of the U.S. border with Quebec, Canada, and discharges into Long Isl ...

Massachusetts Massachusetts ( ; ), officially the Commonwealth of Massachusetts, is a U.S. state, state in the New England region of the Northeastern United States. It borders the Atlantic Ocean and the Gulf of Maine to its east, Connecticut and Rhode ...

. It is part of the narrow, linear

Metacomet Ridge The Metacomet Ridge, Metacomet Ridge Mountains, or Metacomet Range of southern New England is a narrow and steep fault-block mountain ridge known for its extensive cliff faces, scenic vistas, microclimate ecosystems, and rare or endangered plants ...

that extends from

Long Island Sound Long Island Sound is a sound (geography), marine sound and tidal estuary of the Atlantic Ocean. It lies predominantly between the U.S. state of Connecticut to the north and Long Island in New York (state), New York to the south. From west to east, ...

near

New Haven, Connecticut New Haven is a city of the U.S. state of Connecticut. It is located on New Haven Harbor on the northern shore of Long Island Sound. With a population of 135,081 as determined by the 2020 United States census, 2020 U.S. census, New Haven is List ...

, north through the

to the

Vermont Vermont () is a U.S. state, state in the New England region of the Northeastern United States. It borders Massachusetts to the south, New Hampshire to the east, New York (state), New York to the west, and the Provinces and territories of Ca ...

border. East Mountain is known for its extensive scenic cliffs, unique

microclimate A microclimate (or micro-climate) is a local set of atmosphere of Earth, atmospheric conditions that differ from those in the surrounding areas, often slightly but sometimes substantially. The term may refer to areas as small as a few square m ...

ecosystems, and rare plant communities. It is traversed by the

Metacomet-Monadnock Trail The Metacomet-Monadnock Trail (M&M Trail) is a hiking trail that traverses the Metacomet Ridge of the Pioneer Valley region of Massachusetts and the central uplands of Massachusetts and southern New Hampshire. Although less than from Boston an ...

Geography

East Mountain rises steeply between above the Connecticut River and

Westfield River The Westfield River is a major tributary of the Connecticut River located in the Berkshires and Pioneer Valley regions of western Massachusetts. With four major tributary branches that converge west of the city of Westfield, it flows (measure ...

valleys below; it is roughly long and wide at its widest point, although the steepness of the terrain makes the actual square mileage much larger. The mountain includes many crests and tiered ridges, with a high point of above sea level. Various lakes, ponds and reservoirs are located on it, including Snake Pond, a mountaintop

kettle pond A kettle (also known as a kettle hole, kettlehole, or pothole) is a depression or hole in an outwash plain formed by retreating glaciers or draining floodwaters. The kettles are formed as a result of blocks of dead ice left behind by retreating g ...

. East Mountain extends from the Westfield River on the tri-border of Westfield, West Springfield, and

Agawam, Massachusetts Agawam is a city in Hampden County, Massachusetts, United States. The population was 28,692 at the 2020 census. Agawam sits on the western side of the Connecticut River, directly across from Springfield. It is considered part of the Springfie ...

to the base of Mount Tom in

Holyoke Holyoke is a city in Hampden County, Massachusetts, United States, that lies between the western bank of the Connecticut River and the Mount Tom Range. As of the 2020 United States census, 2020 census, the city had a population of 38,247. Loca ...

; it lies within the towns of Holyoke, Westfield, West Springfield. The Metacomet Ridge continues north as the

Mount Tom Range The Mount Tom Range is a traprock mountain range located in the Connecticut River Valley of Massachusetts. It is a subrange of the Appalachians and part of the Metacomet Ridge that extends from Long Island Sound near New Haven, Connecticut, n ...

and south across the Westfield River as

Provin Mountain Provin Mountain is a very narrow traprock mountain ridge located in the Connecticut River Valley of Massachusetts. It is part of the Metacomet Ridge which extends from Long Island Sound near New Haven, Connecticut, north through the Connecti ...

. The west and south sides of the mountain drain into the Westfield River, thence to the Connecticut River and Long Island Sound; the north and east sides of the mountain drain into the Connecticut River. Because the mountain is an important regional

aquifer An aquifer is an underground layer of water-bearing material, consisting of permeability (Earth sciences), permeable or fractured rock, or of unconsolidated materials (gravel, sand, or silt). Aquifers vary greatly in their characteristics. The s ...

, numerous reservoirs have been constructed on it slopes; these facilities provide drinking water and emergency drinking water to surrounding towns and cities. They include Bearhole Reservoir, McLean Reservoir (formerly called High Service Reservoir), and Ashley Reservoir.

Geology and ecology

East Mountain, like much of the Metacomet Ridge, is composed of

basalt Basalt (; ) is an aphanite, aphanitic (fine-grained) extrusive igneous rock formed from the rapid cooling of low-viscosity lava rich in magnesium and iron (mafic lava) exposed at or very near the planetary surface, surface of a terrestrial ...

, also called traprock, a

volcanic A volcano is commonly defined as a vent or fissure in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface. On Earth, volcanoes are most often fo ...

rock. The mountain formed near the end of the

Triassic Period The Triassic ( ; sometimes symbolized 🝈) is a geologic period and system which spans 50.5 million years from the end of the Permian Period 251.902 million years ago ( Mya), to the beginning of the Jurassic Period 201.4 Mya. The Triassic is the ...

with the

rifting In geology, a rift is a linear zone where the lithosphere is being pulled apart and is an example of extensional tectonics. Typical rift features are a central linear Fault (geology), downfaulted depression, called a graben, or more commonly ...

apart of the

North America North America is a continent in the Northern Hemisphere, Northern and Western Hemisphere, Western hemispheres. North America is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South Ameri ...

n continent from

Africa Africa is the world's second-largest and second-most populous continent after Asia. At about 30.3 million km2 (11.7 million square miles) including adjacent islands, it covers 20% of Earth's land area and 6% of its total surfac ...

and

Eurasia Eurasia ( , ) is a continental area on Earth, comprising all of Europe and Asia. According to some geographers, Physical geography, physiographically, Eurasia is a single supercontinent. The concept of Europe and Asia as distinct continents d ...

Lava Lava is molten or partially molten rock (magma) that has been expelled from the interior of a terrestrial planet (such as Earth) or a Natural satellite, moon onto its surface. Lava may be erupted at a volcano or through a Fissure vent, fractu ...

welled up from the rift and solidified into sheets of strata hundreds of feet thick. Subsequent

faulting In geology, a fault is a planar fracture or discontinuity in a volume of rock across which there has been significant displacement as a result of rock-mass movements. Large faults within Earth's crust result from the action of plate tectonic ...

and

earthquake An earthquakealso called a quake, tremor, or tembloris the shaking of the Earth's surface resulting from a sudden release of energy in the lithosphere that creates seismic waves. Earthquakes can range in intensity, from those so weak they ...

activity tilted the strata, creating the cliffs and ridgeline of East Mountain. Hot, dry upper slopes, cool, moist ravines, and mineral-rich ledges of basalt talus produce a combination of

ecosystems on the mountain that support plant and animal species uncommon in greater Massachusetts. East Mountain is also an important

raptor Raptor(s) or RAPTOR may refer to: Animals The word "raptor" refers to several groups of avian and non-avian dinosaurs which primarily capture and subdue/kill prey with their talons. * Raptor (bird) or bird of prey, a bird that primarily hunt ...

migration path. (See

for more information on the geology and ecosystem of East Mountain).

Conservation and recreation

The mountain is used for

hiking A hike is a long, vigorous walk, usually on trails or footpaths in the countryside. Walking for pleasure developed in Europe during the eighteenth century. Long hikes as part of a religious pilgrimage have existed for a much longer time. "Hi ...

mountain biking Mountain biking (MTB) is a sport of riding bicycles off-road, often over rough terrain, usually using specially designed mountain bikes. Mountain bikes share similarities with other bikes but incorporate features designed to enhance durability ...

cross country skiing Cross-country skiing is a form of skiing whereby skiers traverse snow-covered terrain without use of ski lifts or other assistance. Cross-country skiing is widely practiced as a sport and recreational activity; however, some still use it as a m ...

hunting Hunting is the Human activity, human practice of seeking, pursuing, capturing, and killing wildlife or feral animals. The most common reasons for humans to hunt are to obtain the animal's body for meat and useful animal products (fur/hide (sk ...

fishing Fishing is the activity of trying to catch fish. Fish are often caught as wildlife from the natural environment (Freshwater ecosystem, freshwater or Marine ecosystem, marine), but may also be caught from Fish stocking, stocked Body of water, ...

, and

snowshoeing Snowshoes are specialized outdoor gear for walking over snow. Their large footprint spreads the user's weight out and allows them to travel largely on top of rather than through snow. Adjustable bindings attach them to appropriate winter footw ...

. Although not a high mountain, it boasts more open ledge than any other mountain in Massachusetts, offering excellent views of the rural countryside to the west and the urban landscape of metropolitan

Holyoke, Massachusetts Holyoke is a city in Hampden County, Massachusetts, United States, that lies between the western bank of the Connecticut River and the Mount Tom Range. As of the 2020 United States census, 2020 census, the city had a population of 38,247. Loca ...

to the east. Threats to the mountain and its unique habitats and vistas include

suburban sprawl Urban sprawl (also known as suburban sprawl or urban encroachment) is defined as "the spreading of urban developments (such as houses and shopping centers) on undeveloped land near a city". Urban sprawl has been described as the unrestricted ...

and

quarrying A quarry is a type of open-pit mine in which dimension stone, rock, construction aggregate, riprap, sand, gravel, or slate is excavated from the ground. The operation of quarries is regulated in some jurisdictions to manage their s ...

, which has been particularly damaging; the southern of the ridgeline have been nearly obliterated by quarrying operations. Although a large portion of the mountain lies within protected watershed lands, much of mountain is located on private land. Other landholders include hunting and fishing clubs and conservation commissions. In 2000, East Mountain was included in a study by the

National Park Service The National Park Service (NPS) is an List of federal agencies in the United States, agency of the Federal government of the United States, United States federal government, within the US Department of the Interior. The service manages all List ...

for the designation of a new

National Scenic Trail The National Trails System is a series of trails in the United States designated "to promote the preservation of, public access to, travel within, and enjoyment and appreciation of the open-air, outdoor areas and historic resources of the Nati ...

now tentatively called the New England National Scenic Trail, which would include the

in Massachusetts and the

Mattabesett Trail The Mattabesett Trail is a long, hook-shaped blue-blazed hiking trail in central Connecticut and a part of the New England National Scenic Trail. One half of the trail follows the high traprock ridges of the Metacomet Ridge, from Totoket ...

and

Metacomet Trail The Metacomet Trail is a '' Blue-Blazed'' hiking trail that traverses the Metacomet Ridge of central Connecticut as part of the New England National Scenic Trail. Despite being easily accessible and close to large population centers, the tra ...

trails in Connecticut.

References

* Farnsworth, Elizabeth J.
Metacomet-Mattabesett Trail Natural Resource Assessment.
2004. PDF cited November 1, 2007. *''The Metacomet-Monadnock Trail Guide''. 9th Edition. The Appalachian Mountain Club. Amherst, Massachusetts, 1999. *

Raymo, Chet Chet Raymo (born September 17, 1936, in Chattanooga, Tennessee) is a noted writer, educator and naturalist. He is Professor Emeritus of Physics at Stonehill College, in Easton, Massachusetts. His weekly newspaper column "Science Musings" appeare ...

and Raymo, Maureen E. ''Written in Stone: A Geologic History of the Northeastern United States''. Globe Pequot, Chester, Connecticut, 1989.

External links

* , AMCBerkshire.org {{Mountains of Massachusetts Geography of Holyoke, Massachusetts Westfield, Massachusetts Metacomet Ridge Mountains of Massachusetts Mountains of Hampden County, Massachusetts

Geography

Geology and ecology

Conservation and recreation

See also

References

External links