Columbia Unglaciated

WWF Abstract

The Columbia River is the second largest river in the United States. The Columbia Unglaciated ecoregion, together with the Upper Snake, marks the portion of the larger Columbia River basin that was never glaciated. This ecoregion covers most of eastern and northern Oregon, reaches just into Washington along the southern border of the state, spans central and southeastern Idaho, and covers small portions of northern Nevada and western Montana.
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Ecozone:Nearctic
Biome:Temperate Floodplain River and Wetlands
Countries:United States
Area:79,453,671 acres (32,153,760 hectares)
Species:All  Endangered  Invasive
Ecoregions provided by World Wide Fund For Nature (WWF). WildFinder: Online database of species distributions, ver. 01.06 WWF WildFINDER