NABSQNO 14S-525174-3842362Centennial Arch in Comanche County, Oklahoma Photo by Jay Wilbur NABSQNO 14S-525174-3842362. Centennial Arch is an arc natural arch eroded through granite. It is located in the Charons Gardens Wilderness Area within the Wichita Mountains National Wildlife Refuge, Comanche County, Oklahoma. It has a span of 40 feet, a height of 4 feet, a width of 3 feet, a thickness of 2 feet, and a separation of 2 feet. Access is via the Elk Mountain trail from the Sunset Picnic Area, then bushwacking using a GPS receiver. Centennial Arch has been documented, at least since the 1950's, as simply "Natural Bridge". It was appropriately renamed in 2007 in honor of the Oklahoma statehood centennial.
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