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Montana trails · Lost Horse Trail

Lost Horse Trail

A 26.6-mile point-to-point in Montana, with 4,747 ft of climbing. Reaches Lost Horse Pass and other lake/pass/summit destinations.

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Length
26.6 mi
Elevation gain
4,747 ft
Difficulty
Expert
Max grade
59%
Steepest mile
+1,322 ft
Tread at ≥10% grade
11.3 mi
Shape
point-to-point
Surface
Ground
Bikes
no
Horses
yes

Elevation profile

2,497 – 7,223 ft147101316192225

Most of the climbing sits in the first third — 61% of the ascent, between mile 0.0 and mile 8.9. It gives back about 4,437 ft along the way, so it rolls rather than climbing steadily.

3-D terrain

3-D terrain view of Lost Horse Trail

USGS 3DEP ELEVATION × ESRI WORLD IMAGERY · VERTICAL ×1.5

Reaches

Getting there

TWIN LAKES TRAILHEAD — parking nearby, restroom, water. 46.15930, -114.49790 · directions

Daylight at the trailhead

On August 31, 2026 — the day this page was generated — first light reaches this trailhead at 6:25 a.m., the sun rises at 6:57 a.m. and sets at 8:18 p.m., and the last usable light fades about 8:49 p.m. (MDT) — 13 h 22 min of daylight. At about 2.7 mph plus 30 minutes per 1,000 feet of climbing, the 26.6-mile route takes roughly 12 h 14 min, so leaving the trailhead at sunrise puts you back around 7:10 p.m. — 1 h 08 min before sunset.

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