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High Plains
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↑Map Legend & Subregion List
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| Name | † | Color on Map | EPA Code‡ |
| Pine Ridge Escarpment | ○ | 25a | |
| Rolling Sand Plains | ○ | 25b | |
| Moderate Relief Plains | ○ | 25c | |
| Flat to Rolling Plains | ○ | 25d | |
| Canadian/Cimarron High Plains | ○ | 25e | |
| Pine Bluffs and Hills | ○ | 25f | |
| Sandy and Silty Tablelands | ○ | 25g | |
| Platte River Valley and Terraces | ○ | 25h | |
| Llano Estacado | ○ | 25i | |
| Shinnery Sands | ○ | 25j | |
| Arid Llano Estacado | ○ | 25k | |
| Front Range Fans | ○ | 25l |
† Status: ✓ = Complete ○ = Needs Image … = Incomplete ∅ = Stub Only
‡ This code refers to the US EPA's Level 4 ecoregion codes for the continental U.S., see here.
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