Washington Level 4 Ecoregions Map
| er10a - Channeled Scablands |
| er10b - Loess Islands |
| er10d - Okanogan Drift Hills |
| er10e - Pleistocene Lake Basins |
| er10f - Dissected Loess Uplands |
| er10g - Yakima Folds |
| er10h - Palouse Hills |
| er10i - Deep Loess Foothills |
| er10l - Lower Snake and Clearwater Canyons |
| er10m - Okanogan Valley |
| er11c - Maritime-Influenced Zone |
| er11f - Canyons and Dissected Highlands |
| er11g - Canyons and Dissected Uplands |
| er11l - Mesic Forest Zone |
| er11m - Subalpine-Alpine Zone |
| er15g - Western Okanogan Semiarid Foothills |
| er15h - High Northern Rockies |
| er15r - Okanogan-Colville Xeric Valleys and Foothills |
| er15s - Spokane Valley Outwash Plains |
| er15u - Inland Maritime Foothills and Valleys | er15u - Northern Idaho Hills and Low Relief Mountains |
| er15w - Western Selkirk Maritime Forest | er15w - Okanogan Highland Dry Forest |
| er15y - Granitic Selkirk Mountains | er15y - Coastal Lowlands |
| er1b - Coastal Uplands | er1b - Low Olympics |
| er1d - Volcanics | er1d - Outwash |
| er1f - Willapa Hills | er1f - Fraser Lowland |
| er2b - Eastern Puget Riverine Lowlands | er2b - San Juan Islands |
| er2d - Olympic Rainshadow | er2d - Eastern Puget Uplands |
| er2f - Central Puget Lowland | er2f - Southern Puget Prairies |
| er2h - Cowlitz/Chehalis Foothills | er2h - Cowlitz/Newaukum Prairie Floodplains |
| er3a - Portland/Vancouver Basin | er3a - Valley Foothills |
| er4a - Western Cascades Lowlands and Valleys | er4a - Western Cascades Montane Highlands |
| er4c - Cascade Crest Montane Forest | er4c - Cascade Subalpine/Alpine |
| er77a - North Cascades Lowland Forests | er77a - North Cascades Highland Forests |
| er77c - North Cascades Subalpine/Alpine | er77c - Pasayten/Sawtooth Highlands |
| er77e - Okanogan Pine/Fir Hills | er77e - Chelan Tephra Hills |
| er77g - Wenatchee/Chelan Highlands | er77g - Chiwaukum Hills and Lowlands |
| er77i - High Olympics | er77i - Yakima Plateau and Slopes |
| er9b - Grand Fir Mixed Forest | er9b - Oak/Conifer Foothills |
Based on Ecoregions developed by the EPA this map describe areas of general similarity in ecosystems and in the type, quality, and quantity of environmental resources, as well as similarity of climate that can assist Washington gardenders.
