The San Rafael Swell is a large geologic feature located in south-central Utah, United States about 16 miles (26 km) west of Green River. The San Rafael Swell, measuring approximately 75 by 40 miles, consists of a giant dome-shaped anticline of sandstone, shale, and limestone that was pushed up during the Paleocene Laramide Orogeny 60–40 million years ago. Since that time, infrequent but powerful flash floods have eroded the sedimentary rocks into numerous valleys, canyons, gorges, mesas, buttes, and badlands.
The San Rafael Swell from 16,000 feet
Interstate 70 in the San Rafael Swell
The Little Grand Canyon on the San Rafael River
Aerial view of San Rafael Desert. Goblin Valley is at lower extreme right, with Wild Horse Butte to the left. The shadow of a contrail marks the San Rafael Reef, with the Swell behind it.
Green River is a city in Emery County, Utah, United States. The population was 847 at the 2020 census.
Aerial of Green River, Utah
Looking north along the Green River from the city
Amtrak #5 pulling into Green River