Wyoming trails · Seneca Lake
A 4.6-mile out-and-back in Wyoming, with 426 ft of climbing. Reaches Barbara Lake and other lake destinations. Managed by USFS 040307.
Most of the climbing sits in the middle third — 56% of the ascent, between mile 1.5 and mile 3.1. It gives back about 742 ft along the way, so it rolls rather than climbing steadily.
On August 31, 2026 — the day this page was generated — first light reaches this trailhead at 6:12 a.m., the sun rises at 6:41 a.m. and sets at 7:55 p.m., and the last usable light fades about 8:24 p.m. (MDT) — 13 h 14 min of daylight. At about 2.7 mph plus 30 minutes per 1,000 feet of climbing, the 9.2-mile round trip takes roughly 3 h 50 min, so leaving the trailhead at sunrise puts you back around 10:31 a.m. — 9 h 24 min before sunset.