In all of the years we have been visiting the park,we had never been to see the Pinnacles. These interesting rock formations are volcanic.

"The Pinnacles can be reached in the summer from the Rim Drive on a paved, 6-mile road. These eerie spires of eroded ash, rise from the edges of Sand and Wheeler Creeks in pinnacle-fashion. Once upon a time, the road continued east of the turn-out, to the former East Entrance of the park. A path now replaces the old road and follows the rim of Sand Creek (and more views of pinnacles) to where the entrance arch still stands." From the National Park Service