Loop about 3 1/2 miles. Trails off loop, albiet short detours. Very steep climb with steep pitches. Wash outs in three spots, but huckers and big drop guys no problem. Very technical single track climb 5 min. from end of ride. Probably semi-hardcore climbers only. Lots of riding on the tip of saddle. Sometimes as smooth as concrete. Clay dirt, Jacked up with the smallest amount of rain. Being in So. Ca, Usually just fine. Gets maintained by LNG gas company, So sometimes loose dirt for awhile.