The state forest's 5,525 acres (2,236 ha) include Wallum Lake and a rare Atlantic white cedar swamp, 5 acres (2.0 ha) of which are designated as a Massachusetts Wildland.

[4] In the 1930s, the Civilian Conservation Corps installed major improvements including a picnic pavilion, an administrative building, and water management infrastructure.

[5] Forest trails are used for hiking, biking, horseback riding, and cross-country skiing.

At the southwest extreme of the park, the tri-state marker, where Connecticut, Massachusetts and Rhode Island are conjoined, may be reached by a short offshoot of the Mid-State Trail.

The forest also offers picnicking, restricted hunting, and a group day-use area.