The Roaring Brook Trail is the longest trail located in Fahnestock State Park. The northern section of the trail goes through the Martin Hugh McGuire Hemlock-Northern Hardwood Area, a protected stand of forest that is important habitat for migrating song birds and is part of the New York Birding Trail. The Roaring Brook Trail passes through extensive swaths of mountain laurel, an evergreen shrub that blooms with pinkish white flowers in late May and June.
The trail is 7.4 miles long with the northern trailhead being 700’ higher than the southern trailhead. It is a mix of technical doubletrack and old carriage roads. It largely parallels the Taconic State Parkway to the east of the park as it travels downhill toward New York City. There are several access points and the trail is often used to create loops with other trails. The northern 1.5 miles are closed to hiking when the ski trails are groomed during the short winter season.