Mount Williams is the 4th highest peak in the Commonwealth of Massachusetts.
It is located in the Greylock Range in Berkshire County.
Located within the Mount Greylock State Reservation, approaches to this peak begin at a variety of trailheads within the Reservation.
The Appalachian Trail traverses the summit of Mount Williams where there is a wide vista overlooking Williamstown and North Adams, MA as well as Pine Cobble Mountain to the north.
Further details about Mount Williams are included in the adjacent mountain descriptions: Greylock, Fitch and Saddle Ball.