Arch in the Sky, Coconino County, Arizona
Photo by Peter Horan
NABSQNO 12S-500700-4083800. Arch in the Sky is a cave natural arch eroded through Navajo sandstone. It is located on the southern edge of Cummings Mesa within the Navajo Nation, in Coconino County, Arizona. The services of a guide must be used to visit this arch. Access requires a backpack of several miles over open desert. Only experienced desert hikers should attempt any of the several routes to the arch. Vreeland listed Arch in the Sky as number 12-8 in his catalog and estimated a span of 75 feet. However, this arch has never been properly measured and may have a span over 100 feet.