L.A.'s Mountain Biking Trails Mount Wilson to JPL Click Here for Map 999 You'll start at Mt. Wilson and end at JPL. Leave a car at JPL then, take the 210 West exit Angela's Crest Hwy. Go North on Angela's Crest until you hit the Red Box trailhead. Go in the parking lot, but keep going toward Mt. Wilson. Drive until you see a dirt parking area on your left and a white trail gate on your right. Park on the left, gear up and head for the gate. Advanced Current Trail Rating = 10 Click Here to Rate this Trail Click Here to Return to Trails Home