Glenn Campground via Devil's Canyon Dam Truck Trail is a 12.6 mile moderately trafficked out and back trail located near Azusa, California 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.
It’s a pretty easy hike. The road is paved and heavily trafficked for the first couple of miles but relatively quiet afterwards.
I was struck by the scenery on the way in. Perhaps because of that I was a little disappointed with the campground. It isn’t bad but I did feel a little letdown after such a stunning walk-in. Oh, don’t count on the toilets being unlocked so you may want to bring a trowel if you’re planning on camping.