|Length||9 mi (14 km) north-south|
|Biome||northern hardwood forest|
|Period||440 million years|
|Type of rock||thrust fault|
Yokun Ridge is a ridge in the Taconic Mountains in Berkshire County, Massachusetts, consisting of a well-defined series of contiguous peaks including West Stockbridge Mountain and Lenox Mountain. The name "Yokun Ridge" was first applied to the ridge in 1971 by the Berkshire Natural Resources Council and was subsequently designated by the United States Board on Geographic Names in 2009. Yokun Ridge is 9 miles (14 km) long and contains a conservation planning area called the Stockbridge-Yokun Ridge Reserve designated in 1993 by the U.S. Forest Service under its Forest Legacy Program. The ridge is notable for outdoor recreation and scenic beauty, as well as its conserved land and proximity to the tourist destinations of Lenox and Stockbridge. Yokun Ridge is located within West Stockbridge, Stockbridge, Lenox, Richmond, and Pittsfield, Massachusetts. Approximately one-third of the ridge is protected as open space reserve, municipal watershed, and wildlife sanctuary.
Yokun Ridge includes, from south to north, West Stockbridge Mountain 1,831 feet (558 m), Lenox Mountain 2,139 feet (652 m), Yokun Seat 2,133 feet (650 m), The Damp 1,814 feet (553 m), and Mahanna Cobble 1,903 feet (580 m). Subordinate peaks located off the main ridge crest include Baldhead 1,677 feet (511 m) (now wooded at its summit), Osceola Mountain 1,548 feet (472 m), and The Cobble 1,558 feet (475 m).
Water bodies related to the ridge include Lake Averic, Fairfield Pond, the two Lenox Reservoirs, Shadowbrook Reservoir (also called Monks Pond), and Darey Pond, as well a number of small brooks, ponds, and wetlands. A waterfall is located in Stevens Glen on the west side of Lenox Mountain. The southwest side of the ridge drains into Cone Brook, thence into the Williams River, the Housatonic River, and Long Island Sound; the southeast side drains into Marsh Brook, Stockbridge Bowl, and Larrywaug Brook, thence into the Housatonic River; the northwest side drains into Richmond Pond and Southwest Branch Brook, thence the Housatonic River; and the northeast side drains into Yokun Brook, thence into the Housatonic River.
The name Yokun derives from Jehoiakim Yokun, a Native American of the Mahican tribe. As early as the 19th Century, Yokun's name applied to "Yokun Seat," a summit of Lenox Mountain. This term was accepted by the Board of Geographic Names in 1894.
George Wislocki, first director of the Berkshire Natural Resources Council, first applied the name "Yokun Ridge" to this landform in 1971. The name was accepted by the U.S. Board on Geographic Names in 2009 as the name of a 9-mile (14 km) long ridge of the Taconic Mountains including West Stockbridge Mountain, Lenox Mountain, Mahanna Cobble, Yokun Seat, and Baldhead. The Appalachian Mountain Club uses the term in the 2004 and 2009 edition of its Massachusetts Trail Guide.  The Massachusetts Audubon Society, the Town of Lenox, and the Bousquet Ski Area have also used the term.
In the 1740s, Jehoiakim Yokun and another Native American of the Mahican Tribe bought all the unsold land between Stockbridge and Pittsfield for 12 English pounds from two fellow tribesmen. The land was subsequently acquired by the English in the 1750s. The Dutch name "Jehoiakim" may indicate that Jehoiakim Yokun was baptized by the Dutch in the Hudson Valley, a region where most Mahicans resided at the time. Yokun subsequently was active in the French and Indian Wars while later his son, Timothy, participated in the American Revolution as a member of the Stockbridge Militia at the Siege of Boston and died in a battle in the vicinity of present-day Van Courtlandt Park in Bronx, N.Y. "Yokuntown" (a designation for the village of Lenox in the 18th Century) was named after Yokun.
During the late 19th Century's Gilded Age much of Yokun Ridge was held by a handful of large estates, including the Stokes property, whose 1894 "Shadowbrook Cottage" below Baldhead was at the time reputedly the largest residence in America. It later became the site of a Catholic seminary and was subsequently destroyed by fire. The seminary's replacement building is currently occupied by the health and yoga retreat Kripalu. A former Stokes outbuilding is part of the Shadow Brook Farm Historic District. The American author Nathaniel Hawthorne, who briefly lived near Yokun Ridge, describes a fictional walk to the top of Baldhead in his A Wonder-Book for Girls and Boys (1852). In the same work, Hawthorne describes Shadow Brook, the local name for a minor stream that flows in the ravine separating Baldhead from the southern reach of Lenox Mountain.
Tourism helped to boost interest in recreation and conservation in the area as early as 1929, when the Lenox Garden Club established the Pleasant Valley Wildlife Sanctuary on Lenox Mountain, now owned by the Massachusetts Audubon Society. The Bousquet Ski Area opened in 1932 on the north side of the ridge at Mahanna Cobble. The New York Philharmonic gave a series of summer concerts in 1934 at the Hanna Estate, located on the lower east side of West Stockbridge Mountain. Two years later, the Boston Symphony began its longstanding seasonal residency at nearby Tanglewood, the former Brooks Estate.
The ridge and certain outlying features were designated as part of a conservation planning area in 1993 by the U.S. Forest Service under its Forest Legacy Program. Called the "Stockbridge-Yokun Ridge Reserve," it is among at least five in Massachusetts authorized in 1993 by the program, which enables federal purchases of conservation easements. About 370 acres (1.5 km2) in the Stockbridge-Yokun Ridge Reserve had been conserved using the program as of 2000. The northern boundary of the Stockbridge-Yokun Ridge Reserve conservation zone includes Mud Pond and its surrounding wetlands, and the outlying summit of South Mountain 1,388 feet (423 m). Both are located in Pittsfield.
In December 2010, the Berkshire Natural Resources Council closed on the purchase of 80 acres of land around Mahanna Cobble from the Bousquet Ski Area after two years of negotiation.
The BNRC maintains trails through its Olivia's Lookout property on West Stockbridge and Lenox Mountain; they also manage a roadside scenic vista along Lenox Road at the Stockbridge/ Lenox border, as well as Steven's Glen, a waterfall on Lenox Mountain Brook. The Massachusetts Audubon Society (MAS) maintains a network of hiking trails at their Pleasant Valley Wildlife Sanctuary in Lenox. Cooperative agreements with towns, private landholders, and MAS and BNRC have resulted in the marking of a ridgeline trail extending from the southern end of West Stockbridge Mountain to the Bousquet Ski Area. The trails are open to hiking, skiing, picnicing, and similar pursuits. Mountain biking is permitted in some areas.
- (2009) United States Board on Geographic Names. Database entry. . Retrieved February 10, 2011.
- Berkshire Eagle, Sunday October 24, 2010 Section: Local.
- Yokun Ridge (2005). Berkshire Natural Resources Council. Pittsfield, Massachusetts.
- Frazier, Patrick (1994).The Mohicans of Stockbridge University of Nebraska Press.
- Friends, family gather at Mahanna Cobble to thank Wislocki. Resources Report, v. 18, no. 2, page 4. Berkshire Natural Resources Council. Fall 2010.
- Berkshire Eagle newspaper, Sunday October 24, 2010. Section: Local.
- Massachusetts Trail Guide (2004). Boston: Appalachian Mountain Club.
- Massachusetts Trail Guide, 9th Edition (2009). Boston: Appalachian Mountain Club.
-  Lautzenheiser, Tom. "The Myth of the Unchanging Forest." Sanctuary Magazine, Fall 2010. Massachusetts Audubon Society. Retrieved May 6, 2011.
- "At-a-Glance" Town of Lenox website. Retrieved May 6, 2011.
- "Summer Camp in the Berkshires" Bousquet Ski Area, 2011. Retrieved May 6, 2011.
- A Wonder-Book for Girls and Boys 1852
- Laurie Puliafico, Clarence J. "Clare" Bousquet; The founding of Bousquet Ski Area
- "BNRC Closes Purchase of Mahanna Cobble"
- Pleasant Valley Wildlife Sanctuary. Massachusetts Audubon Society. Retrieved january 5, 2009.