Fs 405-L1 is a hiking, biking, and horse trail in Broadwater County, Montana. It is within Helena National Forest. It is 2.5 miles long and begins at 7,345 feet altitude. Traveling the entire trail is 5.1 miles with a total elevation gain of 1,344 feet. The Park/New Era Mine (elevation 7,234 feet) quarry can be seen along the trail.
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