National Forest Development Road 550 is a hiking, biking, and horse trail in Grant County, Oregon. It is within Ochoco National Forest. It is 4.7 miles long and begins at 4,737 feet altitude. Traveling the entire trail is 9.4 miles with a total elevation gain of 740 feet. The Dual Reservoir (elevation 4,869 feet) reservoir can be seen along the trail.
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