Overview
- Species Common Name Steelhead / Rainbow / Redband Trout
- Species Scientific Name Oncorhynchus mykiss/Oncorhynchus mykiss irideus
- SMU/ESU/DPS/Subspecies Winter Steelhead/Coastal Rainbow Trout - Lower Columbia SMU (Lower Columbia River DPS)
- Federal Listing Status Threatened
- State Listing Status Sensitive
- SMU/ESU/DPS/Subspecies Winter Steelhead/Coastal Rainbow Trout - Lower Columbia SMU (Lower Columbia River DPS)
Ecoregions
Columbia Plateau
The Columbia Plateau ecoregion was shaped by cataclysmic floods and large deposits of wind-borne silt and sand earlier in its geological history. It is dominated by a rolling landscape of arid lowlands dissected by several important rivers, and extends from the eastern slopes of the Cascades Mountains, south and east from the Columbia River to the Blue Mountains.
West Cascades
The West Cascades ecoregion extends from east of the Cascade Mountains summit to the foothills of the Willamette, Umpqua, and Rogue Valleys, and spans the entire length of the state of Oregon. It is largely dominated by conifer forests, moving into alpine parklands and dwarf shrubs at higher elevations.
Willamette Valley
The Willamette Valley ecoregion is bounded on the west by the Coast Range and on the east by the Cascade Range. This long mostly level alluvial plain has some scattered areas of low basalt, and contrasts with productive farmland and large urban areas. It has the fastest-growing human population in the state resulting in challenges due to land-use changes.