Oregon Level 4 Ecoregions Map
| er10c - Umatilla Plateau |
| er10e - Pleistocene Lake Basins |
| er10g - Yakima Folds |
| er10i - Deep Loess Foothills |
| er10k - Deschutes/John Day Canyons |
| er10n - Umatilla Dissected Uplands |
| er11a - John Day/Clarno Uplands |
| er11b - John Day/ Clarno Highlands |
| er11c - Maritime-Influenced Zone |
| er11d - Melange |
| er11e - Wallowas/Seven Devils Mountains |
| er11f - Canyons and Dissected Highlands |
| er11g - Canyons and Dissected Uplands |
| er11h - Continental Zone Highlands |
| er11i - Continental Zone Foothills |
| er11k - Blue Mountain Basins |
| er11l - Mesic Forest Zone |
| er11m - Subalpine-Alpine Zone |
| er11n - Deschutes River Valley |
| er11o - Cold Basins | er11o - Treasure Valley |
| er12j - Unwooded Alkaline Foothills | er12j - Coastal Lowlands |
| er1b - Coastal Uplands | er1b - Volcanics |
| er1f - Willapa Hills | er1f - Mid-Coastal Sedimentary |
| er1h - Southern Oregon Coastal Mountains | er1h - Redwood Zone |
| er2h - Cowlitz/Chehalis Foothills | er2h - Portland/Vancouver Basin |
| er3b - Willamette River and Tributaries Gallery Forest | er3b - Prairie Terraces |
| er3d - Valley Foothills | er3d - Western Cascades Lowlands and Valleys |
| er4b - Western Cascades Montane Highlands | er4b - Cascade Crest Montane Forest |
| er4d - Cascade Subalpine/Alpine | er4d - High Southern Cascades Montane Forest |
| er4f - Southern Cascades | er4f - Rogue/Illinois Valleys |
| er78b - Oak Savanna Foothills | er78b - Umpqua Interior Foothills |
| er78d - Serpentine Siskiyous | er78d - Inland Siskiyous |
| er78f - Coastal Siskiyous | er78f - Klamath River Ridges |
| er78h - Border High-Siskiyous | er78h - Dissected High Lava Plateau |
| er80d - Pluvial Lake Basins | er80d - High Desert Wetlands |
| er80f - Owyhee Uplands and Canyons | er80f - High Lava Plains |
| er80j - Semiarid Uplands | er80j - Partly Forested Mountains |
| er80l - Salt Shrub Valleys | er80l - Barren Playas |
| er9b - Grand Fir Mixed Forest | er9b - Oak/Conifer Foothills |
| er9d - Ponderosa Pine/Bitterbrush Woodland | er9d - Pumice Plateau |
| er9f - Pumice Plateau Basins | er9f - Klamath/Goose Lake Basins |
| er9h - Fremont Pine/Fir Forest | er9h - Southern Cascade Slope |
| er9j - Klamath Juniper Woodland | er9j - Warner Mountains |
| er9t - Old Cascades |
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 Oregon gardenders.
