Approximately one mile from downtown Adams and nestled some 2,200 feet below the Mount Greylock summit is Greylock Glen. Encompassing 1,063 acres of woodlands, open fields, wetlands, mountain streams, ponds, and even a waterfall, the Glen includes trails used by hikers, naturalists, skiers, snowshoers, mountain bikers, and snowmobiles. The site itself is a mixture of rolling open fields and wooded hillsides, interspersed with several ponds.

Human influence from the preceding decades and centuries can be seen throughout the landscape. The site was cut for timber in the 1800s and extensively farmed until the 1960s. The ponds were created as water features for an 18-hole golf course built in the early 1970s.

Trails at Greylock Glen are intended for walking, hiking, mountain biking, snowshoeing, and cross-country skiing. Motorized vehicles are not allowed except for winter use by snowmobiles on the designated trail to access the Mount Greylock State Reservation.

The Greylock Glen Trails webpage describes all the trails at Greylock Glen.