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Home > Ecological Site Descriptions Oregon Major Land Resource Area DescriptionsClick on an MLRA to see a description of the land use, elevation and topography, climate, water, soils, and potential natural vegetation. MLRA 1. Northern Pacific Coast Range, Foothills, and Valleys MLRA 2. Willamette and Puget Sound Valleys MLRA 3. Olympic and Cascade Mountains MLRA 5. Siskiyou-Trinity Area MLRA 6. Cascade Mountains; Eastern Slope MLRA 7. Columbia Basin MLRA 8. Columbia Plateau MLRA 9. Palouse and Nez Perce Prairies MLRA 10. Upper Snake River Lava Plains and Hills MLRA 11. Snake River Plains MLRA 21. Klamath and Shasta Valleys and Basins MLRA 23. Malheur High Plateau MLRA 24. Humboldt Area MLRA 25. Owyhee High Plateau MLRA 43. Northern Rocky Mountains |
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