Berkshire County, Massachusetts, United States
13.0 miles (21.0 km) · 3,543 ft elevation gain · Loop · trail · Route
Mt Greylock, Thunderbolt Trail (MA) is a 13.0-mile loop route in Berkshire County, Massachusetts, United States, gaining 3,576 feet of elevation. The route follows a up-and-over elevation profile. The terrain breaks into 5 distinct sections including 2 significant climbs. The longest climb covers 2.1 miles gaining 2,297 feet at an average 20.6% grade. About 58% of the terrain is runnable, with significant hiking sections. The route opens with a climb and finishes with a descent.
Preview this trail in 3D flyover, view the elevation profile, and explore the segment breakdown.
View Full Route Details →