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Region
- Colorado[remove]188
- United States20
- Utah11
- New Mexico10
- Wyoming8
- Chicago (Ill.)5
- Sand Creek Massacre National Historic Site (Colo.)5
- Idaho4
- Kansas4
- ColoradoSan Isabel National Forest3
- Green River Formation3
- San Juan Mountains (Colo. and N.M.)3
- Shoshone-Bannock Tribes of the Fort Hall Reservation of Idaho3
- Spanish Peaks Wilderness (Colo.)3
- Arkansas2
- Chesapeake Bay (Md. and Va.)2
- Chinle Formation2
- ColoradoSouth Park2
- ColoradoSouthern Ute Indian Reservation2
- ColoradoYampa River2