National Forest Development Road 312 is a hiking, biking, and horse trail in Boise County, Idaho. It is within Boise National Forest. It is 2.8 miles long and begins at 6,814 feet altitude. Traveling the entire trail is 5.7 miles with a total elevation gain of 1,864 feet. Jackson Peak (elevation 8,107 feet) can be seen along the trail.
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