An unnamed pothole natural arch, Moffat County, Colorado
Photo by Dave Kennedy
NABSQNO 12T-671560-4485560. This unnamed pothole natural arch has eroded through Park City sandstone. It is located in lower Sand Canyon, a short hike north of the Yampa Bench Road (dirt) in Dinosaur National Monument, Moffat County, Colorado. It has a span of about 8 feet.