Centennial arch is one of the magnificient natural arch eroded through Entrada sandstone on the rim of Rattlesnake Canyon in Mesa county, Colorado. The arch has a height of 120 feet. It was called Akiti arch and East Rim Arch in the past. Visit the arch requires permit from Bureau of Land Management (BLM). NABSQNO 12S-685935-4335002 Author rating ♥♥♥♥♥