Union Flat Creek
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Union Flat 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 drai ...
of the
Palouse River The Palouse River is a tributary of the Snake River in Washington and Idaho, in the northwest United States. It flows for U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map accessed May 3, 2011 southw ...
. Beginning at an elevation of near
Genesee Genesee, derived from the Seneca word for "pleasant valley", may refer to: Geographic features Canada *Genesee, Alberta, an unincorporated community United States *Genesee, California *Genesee, Colorado *Genesee County, Michigan *Genesee Co ...
in northern
Nez Perce County, Idaho Nez Perce County (pron. ''Nezz Purse'') is a county located in the U.S. state of Idaho. As of the 2020 census, the population was 42,090. The county seat is Lewiston. The county is named after the Native American Nez Percé tribe. Nez Perce ...
, it flows west into
Whitman County, Washington Whitman County is a county located in the U.S. state of Washington. As of the 2020 census, the population was 47,973. The county seat is Colfax, and its largest city is Pullman. The county was formed from Stevens County in 1871. It is named ...
, passing through the towns of Uniontown and Colton. It then flows to its mouth west of La Crosse, at an elevation of .


See also

*
List of rivers of Washington This is a list of rivers in the U.S. state of Washington. By drainage basin This list is arranged by drainage basin. Respective tributaries are indented under each larger stream's name and are ordered downstream to upstream. Fraser River (Britis ...
*
List of rivers of Idaho This is a list of rivers in the U.S. state of Idaho. By drainage basin This list is arranged by drainage basin, with respective tributaries indented under each larger stream's name. Pacific Ocean *''Columbia River (WA)'' ** Snake River ***Palous ...
*
List of longest streams of Idaho A total of seventy streams that are at least long flow through the U.S. state of Idaho. All of these streams originate in the United States except the Kootenai River (third-longest) and the Moyie River (thirty-first-longest), both of which beg ...


References

Rivers of Whitman County, Washington Rivers of Nez Perce County, Idaho Rivers of Washington (state) Rivers of Idaho {{Idaho-river-stub