Willow Creek is a long

tributary A tributary, or affluent, is a stream or river that flows into a larger stream or main stem (or parent) river or a lake. A tributary does not flow directly into a sea or ocean. Tributaries and the main stem river drain the surrounding drainage ...

of the

Snake River The Snake River is a major river of the greater Pacific Northwest region in the United States. At long, it is the largest tributary of the Columbia River, in turn, the largest North American river that empties into the Pacific Ocean. The Snake ...

in the

U.S. state In the United States, a state is a constituent political entity, of which there are 50. Bound together in a political union, each state holds governmental jurisdiction over a separate and defined geographic territory where it shares its sover ...

Idaho Idaho ( ) is a state in the Pacific Northwest region of the Western United States. To the north, it shares a small portion of the Canada–United States border with the province of British Columbia. It borders the states of Montana and Wyom ...

. Beginning at an elevation of east of the

Blackfoot Mountains The Blackfoot Mountains, also called the Blackfoot Range, is a small range of mountains located east of Blackfoot, Idaho, Blackfoot, Idaho. Most of the area is private property, including the range's tallest mountain, Taylor Mountain. This mounta ...

in southeastern

Bingham County Bingham County is a county in the U.S. state of Idaho. As of the 2020 United States Census, the population was 47,992. The county seat and largest city is Blackfoot. Bingham County comprises the Blackfoot, ID Micropolitan Statistical Area, wh ...

, it flows generally north into

Bonneville County Bonneville County is a county located in the U.S. state of Idaho. As of the 2020 census, the county had a population of 123,964, making it the fourth-most populous county in Idaho and the most populous in eastern Idaho. Its county seat and larg ...

and past

Bone A bone is a Stiffness, rigid Organ (biology), organ that constitutes part of the skeleton in most vertebrate animals. Bones protect the various other organs of the body, produce red blood cell, red and white blood cells, store minerals, provid ...

. South of the town of Ririe, the creek is impounded by Ririe Dam, forming

Ririe Reservoir The Ririe Reservoir is a reservoir located near Ririe, Idaho. It allows for irrigation, flood control, and provides recreational opportunities. In 1972 the Ririe Dam, built on Willow Creek (Snake River), Willow Creek by the United States Army Co ...

. It then turns southwest, passing between

Iona Iona (; gd, Ì Chaluim Chille (IPA: �iːˈxaɫ̪ɯimˈçiʎə, sometimes simply ''Ì''; sco, Iona) is a small island in the Inner Hebrides, off the Ross of Mull on the western coast of Scotland. It is mainly known for Iona Abbey, though there ...

and Ucon, before bifurcating into two

distributaries A distributary, or a distributary channel, is a stream that branches off and flows away from a main stream channel. Distributaries are a common feature of river deltas. The phenomenon is known as river bifurcation. The opposite of a distributary ...

, North Fork Willow Creek and South Fork Willow Creek, at an elevation of . Both forks reach the Snake River north of

Idaho Falls Idaho Falls (Shoshoni language, Shoshoni: Dembimbosaage) is a city in and the county seat of Bonneville County, Idaho, Bonneville County, Idaho, United States. It is the state's largest city outside the Boise metropolitan area. As of the 2020 Un ...

. Willow Creek has significant populations of

brown trout The brown trout (''Salmo trutta'') is a European species of salmonid fish that has been widely introduced into suitable environments globally. It includes purely freshwater populations, referred to as the riverine ecotype, ''Salmo trutta'' morph ...

References

Rivers of Idaho Rivers of Bingham County, Idaho Rivers of Bonneville County, Idaho {{Idaho-river-stub

See also

References