Glenn Campground via Devil's Canyon Dam Truck Trail is a 12.6 mile moderately trafficked out and back trail located near Azusa, CA that offers the chance to see wildlife and is rated as difficult. The trail offers a number of activity options and is accessible year-round.
Directions from Azusa, CA: Travel Interstate 210, exit Azusa Avenue. Drive 12 miles north on San Gabriel Canyon Road (Hwy. 39) to the trailhead at the West Fork of the San Gabriel River.