Keystone Road is a hiking, biking, and horse trail in Mineral County, Montana. It is within Lolo National Forest. It is 1.3 miles long and begins at 3,816 feet altitude. Traveling the entire trail is 2.6 miles with a total elevation gain of 1,063 feet. The Lower Prosperity Mine (elevation 4,347 feet) quarry can be seen along the trail.
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