|Noble Canyon singletrack in Cleveland National Forest (40 miles east of San Diego) is a great half-day, 14-mile loop with 2,000 feet of elevation gain. Take lots of water unless you want to use your brain pan as a skillet later on.
Noble Canyon is one of the most advanced and technically challenging rides in San Diego County. The uphill is steep and strenuous. The downhill offers lots of stepped rocks, drop offs and hairpin turns. You should be an advanced or aggressive intermediate rider to do this ride.
Up & Back - Meet at the lower trailhead. Take I-8 east to the Pine Valley Road exit and turn left. Drive .3 miles to Old Hwy 80 and turn left. Drive 1.2 miles to Pine Creek Road and turn right (sharp hairpin turn just past bridge). Drive 1.6 miles and turn right into the "Cleveland National Forest - Trailhead - Noble Canyon" parking area (if you get to the bridge you have gone too far). (Thomas Guide 1237-C3)