National Forest Development Road 400 is a hiking, biking, and horse trail in Crook County, Oregon. It is within Ochoco National Forest. It is 1.1 miles long and begins at 4,551 feet altitude. Traveling the entire trail is 2.2 miles with a total elevation gain of 144 feet. The Buck Reservoir (elevation 4,534 feet) reservoir is near the trailhead.
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