The San Rafael Reef is a geologic feature located in Emery County in central Utah, part of the Colorado Plateau.

Approximately 75 miles (120 km) long, it is the distinctive eastern edge of the San Rafael Swell.

Composed primarily of steeply tilted layers of Navajo and Wingate Sandstone, it has been eroded into tall fins, domes, cliffs, and deep canyons.

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