|San Ysidro (Bouldering)
The left most of the three 20 Bag problems. Low angle, but deceptively "sequencey" moves head straight up.
The first boulder encountered once the dirt road properly begins. Where the Mcmenemy Trail (Lower) meets the dirt road, .5 miles from the trailhead parking, the top of the 20 bag boulder can be see. Head down the Mcmenemy trail a few feet and the 20 Bag problems can be seen on the hikers left. The 20 Bag boulder can be identified by noting the "20" chiseled into the rock face.