The San Rafael River is a tributary of the

Green River Green River may refer to: Rivers Canada * Green River (British Columbia), a tributary of the Lillooet River *Green River, a tributary of the Saint John River, also known by its French name of Rivière Verte *Green River (Ontario), a tributary of ...

, approximately long, in east central

Utah Utah ( , ) is a state in the Mountain West subregion of the Western United States. Utah is a landlocked U.S. state bordered to its east by Colorado, to its northeast by Wyoming, to its north by Idaho, to its south by Arizona, and to it ...

, United States. The river flows across a sparsely populated arid region of the

Colorado Plateau The Colorado Plateau, also known as the Colorado Plateau Province, is a physiographic and desert region of the Intermontane Plateaus, roughly centered on the Four Corners region of the southwestern United States. This province covers an area of ...

, and is known for the isolated, scenic gorge through which it flows.

Description

The river rises in northwestern

Emery County Emery County is a county in east-central Utah, United States. As of the 2010 United States Census, the population was 10,976. Its county seat is Castle Dale, and the largest city is Huntington. History Prehistory Occupation of the San Rafael ...

, approximately southeast of Castle Dale, by the confluence of Cottonwood, Huntington, and Ferron creeks, which provide its headwaters in the

Wasatch Plateau The Wasatch Plateau is a plateau located southeast of the southernmost part of the Wasatch Range in central Utah. It is a part of the Colorado Plateau. Geography The plateau has an elevation of and includes an area of . Its highest point in the ...

region. It flows east-southeast along the north side of the Coal Cliffs and the prominent

anticline In structural geology, an anticline is a type of fold that is an arch-like shape and has its oldest beds at its core, whereas a syncline is the inverse of an anticline. A typical anticline is convex up in which the hinge or crest is the ...

called the

San Rafael Swell The San Rafael Swell is a large geologic feature located in south-central Utah, United States about west of Green River. The San Rafael Swell, measuring approximately , consists of a giant dome-shaped anticline of sandstone, shale, and limeston ...

, passing north of Window Butte (Window Blind Peak) and through two narrow

slot canyon A slot canyon is a long, narrow channel or drainageway with sheer rock walls that are typically eroded into either sandstone or other sedimentary rock. A slot canyon has depth-to-width ratios that typically exceed 10:1 over most of its length and ...

s in

Coconino Sandstone Coconino Sandstone is a geologic formation named after its exposure in Coconino County, Arizona. This formation spreads across the Colorado Plateau province of the United States, including northern Arizona, northwest Colorado, Nevada, and Utah. ...

called the Upper and Lower Black Box. This area is known as the San Rafael Gorge, sometimes called the "Little Grand Canyon". (Actually, the "Little Grand Canyon" is a few miles upstream where the San Rafael passes between the Wedge on the north and Sid's Mountain and No Man's Mountain on the south). After passing through the

San Rafael Reef 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 name given to the distinctive eastern edge of the San Rafael Swell. Composed pr ...

it enters the 15 miles (24 km) long

San Rafael Valley The San Rafael Valley is a high intermontane grass valley in eastern Santa Cruz County, Arizona. The valley is bounded to the west by the Patagonia Mountains, to the north and northeast by the Canelo Hills and to the east by the Huachuca Mountain ...

, where it joins the

from the west, approximately south of the town of

. The San Rafael is the last major tributary of the Green River before it joins the

Colorado River The Colorado River ( es, Río Colorado) is one of the principal rivers (along with the Rio Grande) in the Southwestern United States and northern Mexico. The river drains an expansive, arid drainage basin, watershed that encompasses parts of ...

Canyonlands National Park Canyonlands National Park is an American national park located in southeastern Utah near the town of Moab. The park preserves a colorful landscape eroded into numerous canyons, mesas, and buttes by the Colorado River, the Green River, and their r ...

. Diversion tunnels at the headwaters of the river in the Manti-La Sal National Forest provide

irrigation Irrigation (also referred to as watering) is the practice of applying controlled amounts of water to land to help grow Crop, crops, Landscape plant, landscape plants, and Lawn, lawns. Irrigation has been a key aspect of agriculture for over 5,00 ...

water to

Sanpete County Sanpete County ( ) is a county in the U.S. state of Utah. As of the 2010 United States Census, the population was 27,822. Its county seat is Manti, and its largest city is Ephraim. The county was created in 1850. History The Sanpete Valley ma ...

on the west side of the

References

External links

The San Rafael Swell

{{authority control Rivers of Utah Tributaries of the Green River (Colorado River tributary) Canyons and gorges of Utah San Rafael Swell Tributaries of the Colorado River in Utah

Description

See also

References

External links