Montana trails · Silcox-Headley
Silcox-Headley
A 15.2-mile out-and-back in Montana, with 4,274 ft of climbing. Reaches Big Spring and other lake/pass/spring/summit destinations. Managed by the U.S. Forest Service.
Elevation profile
Most of the climbing sits in the first third — 64% of the ascent, between mile 0.0 and mile 5.1.
3-D terrain
USGS 3DEP ELEVATION × ESRI WORLD IMAGERY · VERTICAL ×1.5
Reaches
- Big Spring (spring)
- Cube Iron Pass (pass)
- Mount Silcox (summit)
- Porcupine Lake (lake)
- Cabin Lake (lake)
- Knowles Lake (lake)
- Grass Lake (lake)
- Frog Lake (lake)
Daylight at the trailhead
On August 31, 2026 — the day this page was generated — first light reaches this trailhead at 6:26 a.m., the sun rises at 6:58 a.m. and sets at 8:24 p.m., and the last usable light fades about 8:56 p.m. (MDT) — 13 h 26 min of daylight. At about 2.7 mph plus 30 minutes per 1,000 feet of climbing, the 30.4-mile round trip works out to roughly 15 h 33 min of walking — more than a single day of daylight here, so plan it as an overnight or hike it in sections.
Loop options
- Upper Graves Creek + Silcox-Headley + Sundance Ridge — 4.6 mi loop, 1,047 ft gain
- Goat Lakes + Silcox-Headley + Honeymoon Creek — 5.6 mi loop, 1,219 ft gain
Nearby trails
- Sundance Ridge — 10.8 mi
- Water Hill — 16.3 mi