NABSQNO 15S-498479-3952214Arch Rock, Pope County, Arkansas Photo by Jay Wilbur NABSQNO 15S-498479-3952214. Arch Rock is an abandoned natural arch eroded through Prairie Grove sandstone. It is located on the Pedestal Rocks loop trail in Pedestal Rocks Scenic Area in northern Pope County, Arkansas. It has a span of about 18 feet.
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