From the White Rock Loop
, head up the singletrack path to the Keystone Thrust. Even though the trail is a mile long, you'll enter the thrust around the 0.75-mile mark. At the thrust, you can easily go off trail to scramble around this ancient rock formation. Continuing to the end of the trail will put you on a ridge overlooking Calico Basin, Turtlehead Peak, and the Keystone Thrust.