Colorado Level 4 Ecoregions Map
| er18a - Rolling Sagebrush Steppe |
| er18d - Foothill Shrublands and Low Mountains |
| er18e - Salt Desert Shrub Basins |
| er18f - Laramie Basin |
| er20a - Monticello-Cortez Uplands |
| er20b - Shale and Sedimentary Basins |
| er20c - Semiarid Benchlands and Canyonlands |
| er20d - Arid Canyonlands |
| er20e - Escarpments |
| er20f - Uinta Basin Floor |
| er21a - Alpine Zone |
| er21b - Crystalline Subalpine Forests |
| er21c - Crystalline Mid-Elevation Forests and Shrublands |
| er21d - Foothills and Shrublands |
| er21e - Sedimentary Subalpine Forests |
| er21f - Sedimentary Mid-Elevation Forests and Shrublands |
| er21g - Volcanic Subalpine Forests |
| er21h - Volcanic Mid-Elevation Forests and Shrublands |
| er21i - Sagebrush Parks |
| er21j - Grassland Parks | er21j - Shrublands and Hills |
| er22b - San Luis Alluvial Flats and Wetlands | er22b - Salt Flats |
| er22e - Sand Dunes and Sand Sheets | er22e - Rolling Sand Plains |
| er25c - Moderate Relief Plains | er25c - Flat to Rolling Plains |
| er25h - Platte River Valley and Terraces | er25h - Front Range Fans |
| er26e - Piedmont Plains and Tablelands | er26e - Mesa de Maya/Black Mesa |
| er26g - Purgatoire Hills and Canyons | er26g - Pinyon-Juniper Woodlands |
| er26i - Pine-Oak Woodlands | er26i - Foothill Grasslands |
| er26k - Sandsheets |
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 Colorado gardenders.
