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Montana
22.1 mi
Distance
477 ft
Gain
7h 37m
Time
We won't guess. Here is exactly what we do and don't know.
What we do know
Inside Custer Gallatin National Forest
2 managing-area boundaries mapped — agency alerts for them feed this page automatically.
Boundary data
What's missing
No access route mapped
We don't yet know which road reaches this trailhead, so we can't tell you if it's gated.
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Why you'll love it
East Trunk
AI-suggested draft · review before you go
No permit or access details on file for this trail — check with the local land manager before you go.
East Trunk is a long-distance trail offering an extended backcountry experience through Montana's wilderness. With over 22 miles of hiking and moderate elevation gain, this trail provides a substantial day hike or backpacking opportunity for those seeking solitude and distance. The trail's gentle gradient makes it accessible for experienced hikers looking to cover significant mileage through varied terrain.
South Fork American Fork
~8 min drive
Accessible 4.87-mile forest hike along South Fork American Fork drainage.
Sweet Grass
~10 min drive
Remote 25-mile backcountry trail with 3,500 ft gain in Sweet Grass, Montana.
Big Timber Falls
~11 min drive
Quick waterfall hike with minimal elevation gain near Big Timber.
Lodgepole Creek
~16 min drive
Steady creek-side climb through lodgepole forest with 935 ft elevation gain.
Big Timber Creek
~14 min drive
Strenuous 11.67-mile alpine climb with 5,266 ft elevation gain.
Blue Lake
~13 min drive
Scenic alpine lake hike with steady climb and rewarding views.
Cottonwood Lake
~19 min drive
Moderate 5.16-mile alpine lake hike with 2,106 ft elevation gain.
South Boundary
~15 min drive
Easy 1.24-mile walk with minimal elevation gain in South Boundary area.
Swamp Lake
~20 min drive
Moderate 4.2-mile hike to scenic alpine lake with steady elevation gain.
Shields Lowline
~21 min drive
Moderate 6.4-mile trail with 437 ft elevation gain and scenic Montana views.
