White Mountain National Forest · New Hampshire, Maine
Lambert Ridge
3.8 mi of trail, end to end · native material surface · trail No. 97262 · trail class 3 · typical grade 12-20% · tread 18-24 inches wide · hiking, bike
Trailhead Smarts Mountain Trailhead Drive there
Smarts Mountain Trailhead the Forest Service's write-up
No Fee Required.
The Smarts Mountain Trailhead is located 5.1 miles east from Lyme on the Lyme-Dorchester Rd. This trailhead primarily serves the Appalachain Trail where it crosses. There is an information and an interpretive kiosk at this site. No other amenities are provided. Going north this section of the AT is called the Lambert Ridge Trail which ascends the scenic Lambert Ridge and then steeply climbs to the summit of Smarts Mountain in 3.9 miles. Going south the AT meanders for about 2.0 miles until reaching another crossing of Lyme-Dorchester Rd. near the Dartmouth Skiway. The Ranger Trail also leaves this trailhead from the eastern end but is no longer maintained as an official trail.
This trailhead on fs.usda.gov
Every trail in White Mountain National Forest
Other trails from the Smarts Mountain Trailhead
About this trail's facts
The lines are the US Forest Service's National Forest System trails layer (public domain), read 2026-10-16 and simplified for the map; the length is the line's, end to end, and the class, surface, grade and tread width are the forest's own entries where it publishes them - a forest that publishes the centreline alone has none. The trailheads and the points along the way are the Service's recreation points, and the write-ups its own recarea text, unedited. Heights come from USGS 3DEP through Terrain Tiles on AWS (Mapzen/Tilezen), read along each line and rounded; a short trail on steep ground can be off by a few tens of feet. Closures change: check the forest's own site before you go.
