Massachusetts trails · Mason NH Rail Trail ext.
Mason NH Rail Trail ext.
A 9.6-mile out-and-back in Massachusetts, with 201 ft of climbing. Reaches Squannacook River Reservoir and other lake destinations. Managed by MassGIS (Bureau of Geographic Information).
Elevation profile
Most of the climbing sits in the final third — 68% of the ascent, between mile 6.4 and mile 9.6.
3-D terrain
USGS 3DEP ELEVATION × ESRI WORLD IMAGERY · VERTICAL ×1.5
Reaches
- Squannacook River Reservoir (lake)
- Walker Pond (lake)
- Harbor Pond (lake)
Getting there
Mason NH Rail Trail ext. access. About 27 min drive (12 mi) from Fitchburg. 42.61391, -71.63447 · directions
Daylight at the trailhead
On October 14, 2026 — the day this page was generated — first light reaches this trailhead at 6:29 a.m., the sun rises at 6:58 a.m. and sets at 6:06 p.m., and the last usable light fades about 6:34 p.m. (EDT) — 11 h 08 min of daylight. At about 2.7 mph plus 30 minutes per 1,000 feet of climbing, the 19.3-mile round trip takes roughly 7 h 20 min, so leaving the trailhead at sunrise puts you back around 2:18 p.m. — 3 h 48 min before sunset.
Across the border
- Continues into NH as Rail trail — view on the map
Nearby trails
- Flat Rock Wildlife Sanctuary — 9.1 mi
- Midstate Trail — 12.7 mi
- Assabet River Rail Trail — 14.0 mi
- North Central Pathway — 18.5 mi