National Forest Development Road 620 is a hiking, biking, and horse trail in Marion County, Oregon. It is within Willamette National Forest. It is 5.2 miles long and begins at 3,095 feet altitude. Traveling the entire trail is 10.5 miles with a total elevation gain of 1,218 feet. The Little Pigeon Prairie (elevation 3,635 feet) wetland can be seen along the trail.
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