Montana trails · Boulder Pass
Boulder Pass
A 29.8-mile network in Montana, with 3,491 ft of climbing. Reaches Brown Pass and other glacier/lake/pass destinations. Managed by the National Park Service.
Elevation profile
Most of the climbing sits in the middle third — 77% of the ascent, between mile 9.9 and mile 19.8. It gives back about 4,003 ft along the way, so it rolls rather than climbing steadily.
3-D terrain
USGS 3DEP ELEVATION × ESRI WORLD IMAGERY · VERTICAL ×1.5
Reaches
- Brown Pass (pass)
- Boulder Pass (pass)
- Lake Janet (lake)
- Upper Kintla Lake (lake)
- Boulder Glacier (glacier)
Getting there
Boulder Pass access. About 3 h 22 min drive (75 mi, 24 of them unpaved) from Kalispell. 48.93608, -114.34564 · directions
Daylight at the trailhead
On October 14, 2026 — the day this page was generated — first light reaches this trailhead at 7:24 a.m., the sun rises at 7:56 a.m. and sets at 6:49 p.m., and the last usable light fades about 7:21 p.m. (MDT) — 10 h 54 min of daylight. At about 2.7 mph plus 30 minutes per 1,000 feet of climbing, the 29.8-mile route works out to roughly 12 h 46 min of walking — more than a single day of daylight here, so plan it as an overnight or hike it in sections.
Nearby trails
- Cleft Rock — 13.8 mi
- Stoney Indian Pass — 27.2 mi