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The '''Owyhee River''' is a tributary of the [[Snake River]] located in northern [[Nevada]], southwestern [[Idaho]] and southeastern [[Oregon]] in the United States. It is {{convert|280|mi}} long.<ref name=OregonEncyclopedia>Owyhee River [https://oregonencyclopedia.org/articles/owyhee_river/], accessed November 3, 2019</ref><ref>{{citeweb|URL =https://www.snakeriverwaterkeeper.org/the-river/tributary-rivers/|title = Table of Tributary Rivers|publisher=snakeriverwaterkeeper.org|accessdate = 3 November 2019}}</ref>
The river's [[drainage basin]] is {{convert|11049|sqmi|km2}} in area, one of the largest subbasins of the [[Columbia River Drainage Basin|Columbia Basin]].<ref>[http://www.nwcouncil.org/fw/subbasinplanning/willamette/plan/EntirePlan.pdf Willamette Subbasin Plan] {{Webarchive|url=https://web.archive.org/web/20120213223320/http://www.nwcouncil.org/fw/subbasinplanning/willamette/plan/EntirePlan.pdf |date=2012-02-13 }}, Northwest Power and Conservation Council</ref> The mean annual [[Discharge (hydrology)|discharge]] is {{convert|995|cuft/s|m3/s}}, with a maximum of {{convert|50000|cuft/s|m3/s|abbr=on}} recorded in 1993 and a minimum of {{convert|42|cuft/s|m3/s|abbr=on}} in 1954.<ref name="nwcouncil">[http://www.nwcouncil.org/fw/subbasinplanning/owyhee/plan/Entire_Plan.pdf Owyhee Subbasin Plan] {{Webarchive|url=https://web.archive.org/web/20071216095204/http://www.nwcouncil.org/fw/subbasinplanning/owyhee/plan/Entire_Plan.pdf |date=2007-12-16 }}, Northwest Power and Conservation Council</ref>
The Owyhee drains a remote area of the arid [[plateau]] region immediately north of the [[Great Basin]], rising in northeastern Nevada and flowing generally northward near the Oregon-Idaho border to the Snake River. Its watershed is very sparsely populated. The Owyhee River and its tributaries flow through the Owyhee Plateau, cutting deep canyons, often with vertical walls and in some places over {{convert|1000|ft|m}} deep.<ref name="nwcouncil"/>
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In 1984, the [[United States Congress]] designated {{convert|120|mi}} of the river as '''Owyhee Wild and Scenic River''' under the Wild and Scenic Rivers Act of 1968 to preserve the river in its free-flowing condition. Part of the designation includes the section of the river downstream from the Owyhee Dam, where the river flows through a remote section of deeply incised canyons surrounded by high canyon rims that are habitat for [[cougar|mountain lion]], [[bobcat]], [[Mule Deer]], California [[Bighorn Sheep]], and a large variety of [[Bird of prey|raptor]]s.
The [[Omnibus Public Land Management Act of 2009]] designated {{convert|323274|acres|ha}} on and around the Owyhee River in Idaho as wilderness.<ref>{{cite web
* [[North Fork Owyhee Wilderness]] - {{convert|43413|acres|ha}}
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* {{Oregon Encyclopedia|owyhee_river}}
* [https://web.archive.org/web/20151223142057/http://oregonwatersheds.org/councils/watershed-councils-without-website/owyhee-watershed-council-1 Owyhee Watershed Council]
* [http://www.opb.org/television/programs/ofg/segment/owyhee-river-canyon-travel-geology/ Owyhee River Journey] Video produced by [[Oregon Field Guide]]
* [https://www.rivers.gov/rivers/owyhee-or.php National Wild and Scenic Rivers System]
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