Tekoa Mountain, 1,121 feet (342 m), is a dramatic, rocky high point overlooking the Westfield River Gorge at the eastern edge of the Berkshire plateau in the towns of Montgomery and Russell, Massachusetts, USA.

Tekoa Mountain, very prominent from the "Jacob's Ladder" section of U.S. Route 20 in the town of Russell, is not a true mountain but a cleaver jutting from a dissected plateau; it was produced by glacial action and through continuous erosion by the Westfield River and Moose Meadow Brook before and after the last ice age.

Tekoa Mountain has been targeted by the United States Fish and Wildlife Service's Connecticut River Valley conservation plan as a "high priority" ecosystem.

The town of Russell and its villages, Woronoco and Crescent Mills, lie at the foot of the mountain along the Westfield River.

During the American Revolutionary War, the north (plateau) side of the mountain was the location of a secret, pro-revolution musket factory operated by early 18th century settler Richard Falley Jr.(slag may be found in the vicinity of the former "musket factory") a home belonging to Falley was located at the base of Tekoa Mountain, more information can be obtained at the Westfield Athenaeum ; the summit was used as a lookout to watch for British spies.