The northern section of Yokun Ridge in Massachusetts can be accessed in Lenox on Reservoir Road.    The Berkshire Natural Resources Council published an excellent map at one point.  There are still some maps online if you look around. The main trail runs across the Lenox Mountain ridge up to Baker's Peak and then down to the Bousquet Ski Area in Pittsfield.  This region is criss-crossed by dirt roads (used and unused) leading to a radio tower, a fire tower, a couple residential areas and a few uncertain locations.  The Yokun Ridge Trail is mostly used by local hikers and is not marked in most places.  Some hikers seem to be trying to take care of the job themselves with spray paint and can tops. Regardless, it offers some of the nicest trails and best views in the Taconic Mountains.