4.0 star · Difficult Loop

Frog Rock via Chestnut Mountain Trail

Custer Gallatin National Forest · Gallatin County, Montana

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Trail length

8.2 km

Time

~2 hrs 23 min

Elevation Gain

451 m

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"An epic challenge to remember from the heart of Gallatin County"

The Frog Rock via Chestnut Mountain Trail is a 8.2 km looped trail that starts and ends in Bozeman, Gallatin County, Montana. Based on our data, the trail is graded as Difficult. For information on how we grade trails, please read measuring the difficulty of a hiking trail on hiiker. Also, check our latest community posts for trail updates.

This trail can be completed in approx 3 hrs 30 mins. Caution is advised on trail times as this depends on multiple variables. For more info read about how we calculate hike time.