Keep your head up for hikers, dogs, and uphill traffic.
One of the area's best singletrack trails with a few ride options from a longer out and back, shuttle, or a lap or two on the upper sections for a quick fix.
-Bishop Region Recreation Topo Map & Guide, Sierra Maps
-Mountain Biking Mammoth, Extremeline Guides
-Mountain Biking Southern California, Falcon Guide
The trail is in somewhat sandy substrate so running a lower tire pressure is nice but its super easy to pinch flat in the rocks. The lower "gorge" section is a "Intermediate/Difficult" rocky commitment so plan accordingly.
Park at the trailhead off of Lower Rock Creek Road just west of Rock Creek. This trailhead has recently been improved and includes signage and a portapotty. Many folks chose to ride up the road to the upper trailhead, or at least to the upper two sections. If you choose to ride up the trail, walk back to the east past a house and look for signs to a singletrack trail that will take you past the private homes.
At the road crossing, for the true XC experience, jump on the trail as it leaves the unpaved parking pullout and ride up to the next road crossing. The trail jogs downhill slightly, crossing the creek on the pavement, before heading uphill again towards the upper trailhead.
The upper two sections (see map) are fast and fun with aspen groves, moderate rock gardens, bridges, and the lower gorge is adventure biking at its best with some gnarly rock gardens, baby heads, and some terrific scenery.
This is signed specifically as a mountain bike trail, the upper sections are managed by USFS and the lower by BLM.