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West Rock Ridge or West Rock of south-central Connecticutmarker, with a high point of , is a long trap rock mountain ridge located on the west side of New Havenmarker. The ridge forms a continuous line of exposed cliffs visible from metropolitan New Haven and points west. West Rock Ridge is part of the narrow, linear Metacomet Ridge that extends from Long Island Soundmarker near New Haven, north through the Connecticut River Valley of Massachusettsmarker to the Vermontmarker border.

West Rock Ridge is popular for recreation and known for its microclimate ecosystems, rare plant communities, and expansive views from cliffs that tower up to above the surrounding landscape. The ridge is traversed by a network of hiking trails including the Regicides Trail and the southern terminus of the Quinnipiac Trail.


Judges' Cave
Judges' Cave and the Regicides Trail (which traverses the length of the ridge), receive their names from two judges Edward Whalley and his son-in-law William Goffe, who had signed the death warrant of Charles I of England in 1649. After the restoration of the monarchy with Charles II of England in 1660, the pair of regicides fled to the area to avoid arrest and hid in a boulder cave on the crest of the ridge intermittently over the summer of that year.

Other notable historic events include the portrayal of the ridge by 19th century landscape painter Frederic Edwin Church in 1849.

The General Assembly of the state of Connecticutmarker established An Act Concerning West Rock Ridge State Park, which established the park when the Connecticutmarker Department of Environmental Protection (DEP) purchased of land from the city of New Havenmarker in 1975. This act gives the DEP the right of first refusal to purchase private land sold within the West Rock Ridge conservation area. The intent of the act is to allow the state to increase the size of the park, which is about .


West Rock Ridge, located in New Havenmarker, Hamdenmarker, Woodbridgemarker, and Bethany, Connecticutmarker, is wide at its widest point, although steepness of the terrain make the actual square mileage much larger. Notable peaks on the ridge include the high point, alternately called High Rock or York Mountain, est. , at the north terminus of the ridge; the southern prominence with a summit parking lot, picnic tables, and observation area, usually referred to as West Rock, , and popularly known as the South Overlook; and several knobs in between those two points. Judges Cave is also located at the southern end of the ridge.

West Rock Tunnel
Rock Ridge is an important aquifer. The ridge is bordered on the west by property owned by the South Central Connecticut Regional Water Authority; reservoirs include Lake Dawson and Lake Watrous. Konolds Pond, which is not used as a water source, is located just north of Rt. 15 in an industrial area.The main body of water inside the park is Lake Wintergreen, , located east of the ridge. There is also a small fishing pond located near Mountain Road, and a flood control pond located at the north end of the park.The Wilbur Cross Parkway (Route 15marker) passes through the south central side of the mountain in theWest Rock Tunnel, also known as the Heroes Tunnel. A network of suburban streets abut the mountain on all sides and a seasonal paved park road climbs to the crest of the ridge and along its length. Several communications towers sprout from the ridge crest.

The Metacomet Ridge extends north from West Rock Ridge as Mad Mare Hill and Mount Sanfordmarker and northeast as Rocky Top and Sleeping Giantmarker. East of West Rock Ridge, the Metacomet Ridge spreads out into a series of low, parallel ridges toward Saltonstall Mountainmarker in Branford, Connecticutmarker; the only noteworthy summit in between is East Rockmarker which looms over New Haven from the north. The west side of West Rock Ridge drains into West Rivermarker, then into Long Island Sound; the east side into Belden Brook thence to West River, and the north side into Mill River thence to New Haven Harbor and Long Island Sound.


South prominence of West Rock from New Haven
The fault-block ridge of West Rock is composed of trap rock, also known as basalt, an extrusive volcanic rock. Basalt is a dark colored rock, but the iron within it weathers to a rusty brown when exposed to the air, lending the ledges of West Rock Ridge a distinct reddish hue. The rock, which formed 200 million years ago during the late Triassic and early Jurassic periods, frequently breaks into octagonal and pentagonal columns, creating a unique "postpile" appearance. Huge slopes made of fractured basalt scree are visible beneath many of the ledges of West Rock Ridge.

The ridge is the product of a huge feeder dike which supplied several massive lava flows hundreds of feet deep that welled up in faults created by the rifting apart of North America from Eurasia and Africa over a period of 20 million years. Erosion occurring between the eruptions deposited deep layers of sediment between the lava flows and around the dike, which eventually lithified into sedimentary rock. The resulting "layer cake" of basalt and sedimentary sheets eventually faulted and tilted upward. Subsequent erosion wore away the weaker sedimentary layers a faster rate than the basalt layers, leaving the abruptly tilted edges of the basalt sheets exposed, creating the distinct linear ridge and dramatic cliff faces visible today along the Metacomet Ridge.


West Rock Ridge hosts a combination of microclimates unusual in New Englandmarker. Dry, hot upper ridges support oak savannas, often dominated by chestnut oak and a variety of understory grasses and ferns. Eastern red cedar, a dry-loving species, clings to the barren edges of cliffs. Lower eastern slopes tend to support oak-hickory forest species common in the surrounding lowlands. Narrow ravines support eastern hemlock that block sunlight, creating damp, cooler growing conditions with associated cooler climate plant species. These hemlocks have suffered from infestation by the hemlock woolly adelgid. Talus slopes are especially rich in nutrients and support a number of calcium-loving plants uncommon in eastern Connecticut. Because the ridge generates such varied terrain, it is the home of several plant and animal species that are state-listed or globally rare.

West Rock Ridge is also an important seasonal raptor migration path.

Recreation and conservation

West Rock Ridge is an outdoor recreation resource popular among residents and visitors of the metropolitan New Haven region. Views from the clifftops span New Haven, the rural landscape to the west as far as the Berkshires, Long Island Sound and Long Islandmarker. Most of the ridge is within the public domain as state and town park land, conservation easement, and watershed property. Housing developments are prevalent on the northern slopes of the ridge but do not reach to the summit crest. The ridge boasts a substantial network of hiking trails and park roads, cliffs, rugged woodlands, scenic ponds and reservoirs, and waterfalls. Two noteworthy hiking trails cross the ridge, the Regicides Trail which traverses the summit crest from end to end, and the Quinnipiac Trail which crosses the northern summit of the ridge and extends north over Sanford Mountain and east over Sleeping Giant. Both are maintained by the non-profit Connecticut Forest and Park Association.

West Rock Ridge State Parkmarker occupies most of the ridgeline as well as the undeveloped Lake Wintergreen on the east side of the mountain. The park is open daily from 8 a.m. to sunset for a variety of recreational uses, including hiking, bicycling, fishing, car-top boating, horseback riding, dog walking, picnicking, and other passive pursuits. The Park Road to the South Overlook and Judges Cave is open daily to vehicle traffic from Memorial Day through the last weekend in October. Park access is free of charge for all users.

For complete recreation information, see West Rock Ridge State Parkmarker.
New Haven from West Rock

The City of New Haven owns and manages the West Rock Nature Center on the southeast side of the mountain. The center offers interpretive programs on local ecology, outdoor skills workshops, and features laboratories, gardens, interpretive trails, a visitor's center, and classroom facilities. The center has been in operation since 1946 and is listed on the State Register of Historic Places by the Connecticut Historical Commission.

The town of Woodbridge owns and manages the Bishop Estate and Darling House Trails, a property on the west flank of the ridge. The property offers a network of trails, historic buildings, gardens, and bridges over the West River. Named for Thomas Darling (1720-1789), active in the American Revolution and a friend and contemporary of Benjamin Franklin, the estate is open to passive activities such as hiking, picnicking, and bird watching. Trails on the property link up with the Regicides Trail on the ridge.

The town of Bethany Conservation Commission, the Town of Hamden, the Woodbridge Land Trust, and the Bethany Land Trust, are also invested in the conservation of West Rock Ridge and its viewshed.

See also

↑ North ↑ Northeast East >
Mount Sanfordmarker

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