Serrano Road/Chamberlain Rock
The trailhead is reached by turning right on Deer Creek Rd. (1/2 mile south of Sycamore Canyon) from PCH. As it climbs, it becomes Pacific View then Cochran. Then make a sharp left on Serrano Rd., which ends at the trailhead. The road is narrow, so turn your vehicle around and park facing uphill. After running downhill, the runner is dumped into the breadbasket of beautiful Serrano Valley with fresh legs. After climbing out, one is treated to panoramic vistas. The Backbone and Chamberlain trails then usher the runner to Chamberlain Rock--The turnaround point.