NABSQNO 12S-696590-4327675![]() An unnamed pillar natural arch, Mesa County, Colorado Photo by Jay Wilbur NABSQNO 12S-696590-4327675. This unnamed pillar natural arch has eroded through Wingate sandstone. It is located above the Coke Ovens Trail in Colorado National Monument, Mesa County, Colorado, and is easily visible from that trail. It has a span of about 4 feet.
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