Connecticut trails · Mount Frissell Trail
A 1.8-mile out-and-back in Connecticut, with 612 ft of climbing. Reaches Round Mountain and other summit/viewpoint destinations.
Most of the climbing sits in the first third — 57% of the ascent, between mile 0.0 and mile 0.6. It gives back about 426 ft along the way, so it rolls rather than climbing steadily.

USGS 3DEP ELEVATION × ESRI WORLD IMAGERY · VERTICAL ×1.5
Mount Frissell Trail access — parking nearby. About 1 h 40 min drive (54 mi, 6 of them unpaved) from Waterbury. 42.05004, -73.46694 · directions
On October 14, 2026 — the day this page was generated — first light reaches this trailhead at 6:36 a.m., the sun rises at 7:04 a.m. and sets at 6:14 p.m., and the last usable light fades about 6:42 p.m. (EDT) — 11 h 09 min of daylight. At about 2.7 mph plus 30 minutes per 1,000 feet of climbing, the 3.6-mile round trip takes roughly 1 h 58 min, so leaving the trailhead at sunrise puts you back around 9:02 a.m. — 9 h 12 min before sunset.