Northeast of Stanley near Clayton in the Salmon-Challis National Forest, the Upper Harden Creek / Coal Creek Trail (#167) is a 10 mile route.
To reach the dirt biking trailhead from Clayton, head west on SR75 for 24 miles. Turn right on Lower Harden Creek Road. Parking is just off the road.
Overall, Upper Harden Creek / Coal Creek Trail is the 13th most popular dirt bike trail of all 53 dirt biking rides in Idaho.