Fs 3931 is a hiking, biking, and horse trail in Madison County and Beaverhead County, Montana. It is within Beaverhead-Deerlodge National Forest. It is 7.9 miles long and begins at 7,115 feet altitude. Traveling the entire trail is 15.8 miles with a total elevation gain of 2,185 feet.
Sign in/up to upload photos.