Regions

Arizona

• Grand Canyon
• Painted Desert
• Sonoran Desert

California

• Anza Borrego and Southern Deserts
• Central and Northern California Coast Ranges
• Death Valley
• Inyo and White Mountains
• Joshua Tree
• Lake Tahoe and Northern Sierra
• Mojave Desert
• Sierra Nevada
• Southern California Coast and Mountains

Colorado

• Northwest Colorado
• Southwest Colorado

Idaho

• Central Idaho

Lost

• Lost

Montana

• Montana's Central Rockies

Nevada

• Central Nevada and Elko
• Great Basin and Eastern Nevada
• Southern Nevada and Tonopah Basin
• Western Nevada and the Black Rock Desert

Utah

• Canyonlands and Eastern Utah
• Grand Staircase and San Rafael Swell
• Western Utah Desert