The
Sweetwater River is a tributary of the
North Platte River, 238 miles long,
in the
U.S. state of
Wyoming. Its waters eventually reach the
Atlantic Ocean. The Sweetwater rises in southwestern
Fremont County, at the continental divide near
South Pass Wyoming, on the southern end of the
Wind River Range. It flows ENE along the north side of the
Antelope Hills, then ESE, through Fremont County, past
Jeffrey City, between the
Granite Mountains to the north and the Green Mountains to the south, through what are now cattle-raising areas. In southern
Natrona County, it passes
Devil's Gate and
Independence Rock along the
Oregon,
California and
Mormon Trails, and empties into the North Platte as the Sweetwater arm of
Pathfinder Reservoir.