L.A.'s Mountain Biking Trails Rim Trail via Mount Wilson Loop Click Here for Map 210 Freeway exit Altadena Drive and head towards the mountains. Turn right on Crescent Dr. and right on Pinecrest. Please observe the parking & gate restrictions. To do the Rim Trail option Skyline Park Access hours are 9am to 4pm Saturday & Sunday ONLY** Please call the USFS at 818-790-1151 for more information. The Rim Trail is unsigned and is hard to locate. Advanced Current Trail Rating = 10 Click Here to Rate this Trail Click Here to Return to Trails Home