ARIZONA NEVADA COLORADO NEW MEXICO WYOMING COLORADO IDAHO NEVADA Great Salt Lake Lake Powell Be a ve r R iv e r Sevier Bridge Reservoir Utah Lake Strawberry Reservoir Starvation Reservoir S tra wbe r ry R iv er W eber R iver Bear Lake Flaming Gorge Reservoir L a ke Fo r k R iv er Du che s n e Ri v er Gr ee n Ri ver W h it e River Uin ta R i v er Gre en River Prov o Rive r F re mo nt River D u che sne R iver V irg i n R iv er San Ju an Riv er Sevier Lake (Dry) P ric e R iv e r S a n R a p h a e l R i v e r G re e n R iv e r C olo r a d o R i v e r C olorado River D irty De v i l R i v e r S e v i e r R iver S e v i e r R i ver Escala nte River P a r ia Rive r 80a 80b 80a 80h 80a 13c 80c 13i 13b 19f 19f 19d 19d 18d 13a 13g 13b 18c 13c 19d 13g 19g 13a 13a 18d 13c 19g 19d 13f 13f 19d 19d 19d 19d 19d 13d 13c 19g 13b 13c 13b 13b 13b 13c 13a 13d 13c 19g 13c 13d 13c 19d 13d 13c 13c 19d 13g 13d 13c 13c 13b 13d 13b 19g 19c 19c 13g 13b 19b 13d 18a 19f 18a 19a 13d 18c 19g 18a 19d 13e 13c 20c 19a 13d 19b 13e 13e 19a 13d 19g 19b 19d 19a 20g 13d 20c 13b 13e 13d 13d 13a 13e 20f 13a 13d 19g 13c 19f 13g 13g 13g 13g 19d 13c 13c 13d 13c 13c 20e 19d 13d 13d 13c 19a 13c 13a 13c 13d 19g 13d 19g 20c 19d 13d 13d 20c 20c 20b 20b 13d 13d 13d 13a 20c 13a 13g 19d 13d 13d 13b 13b 13d 20c 19e 20d 13d 19d 13d 13c 19g 20h 19e 20d 20d 19e 20c 19a 19g 20c 19g 19e 20c 21c 21b 21a 19e 13a 13b 13b 19g 21a 19f 19g 19e 13d 19e 20e 19e 20a 19e 20e 19f 21c 19e 14a 21b 21b 20c 14b 14a 20h 20a 20e 20c 20h 20e 20h 20c 20h 20c 20h 80 17 18 18 13 21 19 20 20 20 14 14 22 22 21 13g 14b 80b 13c 13c 14c 19a 19d 19f 19f 80 80b 80b 80h 13c 80b 13d 80 80 80 13d 13d 13d 80i 114 113 112 111 110 109 114 113 112 111 110 109 37 38 39 40 41 42 37 38 39 40 41 42 Salt Lake City Beaver Milford Brigham City Castle Dale Green River Coalville Kamas Duchesne Evanston Farmington Fillmore Black Rock Delta Green River Heber City Junction Kanab Kemmerer Loa Hanksville Logan Randolph Tremonton Snowville Rosette Lucin Manila Manti Moab Crescent Junction Monticello La Sal Morgan Nephi Ogden Huntsville Panguitch Henrieville Big Water Escalante Antimony Widtsoe Jct Boulder Torrey Parowan Lund Enterprise Provo Richfield Saint George Springdale Tooele Vernal Roosevelt Altamont Ouray Trout Creek Callao Wendover Spanish Fork Santaquin American Fork Garrison Gandy Cedar City Hamlin Valley Blanding Bluff Mexican Hat Hite Crossing Price Rock Springs Dugway Rainbow Bridge NM Natural Bridges NM Hovenweep NM Dinosaur NM Canyonlands NP Arches NP Glen Canyon NRA Capitol Reef NP Bryce Canyon NP Grand Staircase- Escalante NM Zion NP Cedar Breaks NM Level III ecoregion Level IV ecoregion County boundary State boundary 80 Northern Basin and Range 80a Dissected High Lava Plateau 80b Semiarid Hills and Low Mountains 80c High Elevation Forests and Shrublands 80h Saltbush-Dominated Valleys 80i Sagebrush Steppe Valleys 20 Colorado Plateaus (continued) 20g Northern Uinta Basin Slopes 20h Sand Deserts 21 Southern Rockies 21a Alpine Zone 21b Subalpine Forests 21c Dry Forests and Shrublands 20 Colorado Plateaus 20a Monticello Upland 20b Shale Deserts 20c Semiarid Benchlands and Canyonlands 20d Arid Canyonlands 20e Escarpments 20f Uinta Basin Floor 18 Wyoming Basin 18a Rolling Sagebrush Steppe 18c Wet Valleys 18d Semiarid Bear Hills 19 Wasatch and Uinta Mountains 19a Alpine Zone 19b Uinta Subalpine Forests 19c Mid-elevation Uinta Mountains 19d Wasatch Montane Zone 19e High Plateaus 19f Semiarid Foothills 19g Mountain Valleys 13 Central Basin and Range 13a Salt Deserts 13b Shadscale-Dominated Saline Basins 13c Sagebrush Basins and Slopes 13d Woodland- and Shrub-Covered Low Mountains 13e High Elevation Carbonate Mountains 13f Moist Wasatch Front Footslopes 13g Wetlands 13i Malad and Cache Valleys 14 Mojave Basin and Range 14a Creosote Bush-Dominated Basins 14b Arid Footslopes 14c Mountain Woodland and Shrubland 30 60 mi 0 60 120 km 0 5 10 15 10 20 30 Albers Equal Area Projection Standard parallels 38 N and 41 N Ecoregions of Utah INTERIOR—GEOLOGICAL SURVEY, RESTON, VIRGINIA—2001