Ancient stream cobble used to construct a spiral labyrinth along the Backbone Trail
alt="A closer look at the ancient stream cobble used to construct the spiral labyrinth on the Backbone Trail, east of the Corral Canyon Trailhead. Photo taken October 30, 2011." border="0">
A closer look at the ancient stream cobble used to construct the spiral labyrinth on the Backbone Trail, east of the Corral Canyon Trailhead. Photo taken October 30, 2011.