Muddy Creek (central Utah)



Muddy Creek is a stream in central Utah, United States, that drains portions of Emery, Sanpete, Sevier, and Wayne counties.

Description
The creek begins on the eastern slopes of the Wasatch Plateau at elevations above 10500 ft. It turns southward near the town of Emery, then southeastward, where it crosses under Interstate 70. It then directly enters the western flank of the San Rafael Swell and continuing in a southeasterly direction, it passes Hondu Arch, and the Tomsich Butte mining area then begins its spectacular passage through a narrow slot canyon of Coconino Sandstone known as the "Chute".

After merging with Chimney Canyon and passing the Hidden Splendor Mine area, it passes through the southeastern escarpment of the San Rafael Reef at the end of Muddy Creek Gorge. In its lower reaches, it continues southeastward through the Blue Hills badlands near Caineville, then cuts through the Jurassic Morrison Formation where dinosaur fossils have been found. Finally, after an estimated length of 100 mi and a drop of 6000 ft, it meets the Fremont River some miles north of the town of Hanksville where the two form the Dirty Devil River (which then flows south to meet the Colorado River).

Since it enters the San Rafael Swell at an elevation well below that attained by the Swell itself and continues through the Swell's entire expanse, Muddy Creek is a very ancient river course, "superimposed" on the entire San Rafael uplift and therefore predating the time when the latter arose some 60-40 million years ago.

Wilderness
Designated in 2019 by the U.S. Congress, the Muddy Creek Wilderness encompasses the pristine portion of the creek that enters the San Rafael Swell. The 98,023 acres wilderness area is managed by the U.S. Bureau of Land Management.