Fs 621 is a hiking, biking, and horse trail in Jefferson County and Broadwater County, Montana. It is within Helena National Forest. It is 5.2 miles long and begins at 6,660 feet altitude. Traveling the entire trail is 10.4 miles with a total elevation gain of 1,416 feet. The Two Sam Spring can be seen along the trail. There is also a water tower along the trail.
Sign in/up to upload photos.