| Snake–Columbia shrub steppe | |
| Country: | United States |
| State: | Washington |
| State1: | Oregon |
| State2: | California |
| State3: | Idaho |
| State4: | Nevada |
| Border1: | Blue Mountains forests |
| Border2: | Cascade Mountains leeward forests |
| Border3: | Eastern Cascades forests |
| Border4: | Palouse grasslands |
| Border5: | South Central Rockies forests |
| Bird Species: | 207[1] |
| Mammal Species: | 104 |
| Habitat Loss: | 19.112 |
| Protected: | 58.45 |
| Area: | 218077[2] |
| Biome: | Deserts and xeric shrublands |
| Biogeographic Realm: | Nearctic |
| Climate: | Cold desert (BWk) and cold semi-arid (BSk) |
| Map: | Snake-Columbia Shrub Steppe map.svg |
| Map Size: | 250px |
The Snake–Columbia shrub steppe is an ecoregion defined by the World Wide Fund for Nature (WWF). This ecoregion receives little precipitation because it is within the rain shadow of the Cascade Range. It takes in a western portion of the Columbia Basin in Washington, and extends south along the Deschutes River Basin, expanding to cover most of southeast Oregon including the Oregon Lakes region. This ecoregion reaches south from Oregon into northern Nevada and the northeast corner of California. It also connects east onto the Snake River Plain, which it follows east from Hells Canyon to the continental divide in eastern Idaho.
Information about this ecoregion is covered by three articles that follow the ecoregion definitions of the United States Environmental Protection Agency: