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Level III Ecoregions of California

Revised April 2000
National Health and Environmental Effects Research Laboratory
U.S. Environmental Protection Agency

level III ecoregions of California region 1   1. Coast Range
region 4   4. Cascades
region 5   5. Sierra Nevada
region 6   6. Southern/Central California Chaparral/Oak Woodlands
region 7   7. Central California Valley
region 8   8. Southern California Mountains
region 9   9. Eastern Cascade Slopes and Foothills
region 13   13. Central Basin and Range
region 14   14. Mojave Basin and Range
region 78   78. Klamath Mountains
region 80   80. Northern Basin and Range
region 81   81. Sonoran Basin and Range