Idaho trails · Timber Mountain Trail
A 13.5-mile out-and-back in Idaho, with 3,835 ft of climbing. Reaches Timber Mountain and other lake/summit destinations.
Most of the climbing sits in the first third — 62% of the ascent, between mile 0.0 and mile 4.5. It gives back about 2,639 ft along the way, so it rolls rather than climbing steadily.
East Fork Boulder access. 48.59766, -116.09252 · directions
On August 31, 2026 — the day this page was generated — first light reaches this trailhead at 5:27 a.m., the sun rises at 5:59 a.m. and sets at 7:28 p.m., and the last usable light fades about 8:01 p.m. (PDT) — 13 h 29 min of daylight. At about 2.7 mph plus 30 minutes per 1,000 feet of climbing, the 27.0-mile round trip works out to roughly 13 h 51 min of walking — more than a single day of daylight here, so plan it as an overnight or hike it in sections.