Idaho trails · Curtis Lake
A 19.1-mile out-and-back in Idaho, with 1,422 ft of climbing. Reaches Darrah Reservoir and other lake destinations. Managed by the Bureau of Land Management.
The climbing leans toward the middle third: 54% of the ascent falls between mile 6.4 and mile 12.8. It gives back about 693 ft along the way, so it rolls rather than climbing steadily.
Curtis Lake access. 43.26750, -114.50389 · directions
On August 31, 2026 — the day this page was generated — first light reaches this trailhead at 6:31 a.m., the sun rises at 7:00 a.m. and sets at 8:15 p.m., and the last usable light fades about 8:44 p.m. (MDT) — 13 h 14 min of daylight. At about 2.7 mph plus 30 minutes per 1,000 feet of climbing, the 38.3-mile round trip works out to roughly 15 h 36 min of walking — more than a single day of daylight here, so plan it as an overnight or hike it in sections.