The Duchesne River (/duːˈʃeɪn/ doo-SHAYN), located in the Uintah Basin region of Utah in the western United States, is a tributary of the Green River. The watershed of the river covers the Northeastern corner of Utah. The Duchesne River is 115 miles (185 km) long, and drains a total land area of 3,790 square miles (9,800 km2).