Region
Utah
San Juan County
128
Garfield County
55
Kane County
53
Emery County
45
Colorado
32
Grand County
24
Wayne County
24
Arizona
21
Millard County
19
Uintah County
17
Iron County
14
Beaver County
11
Nevada
11
Carbon County
10
Utah County
10
Coconino County
9
Salt Lake County
9
Tooele County
9
Wyoming
9
Duchesne County
7
Juab County
7
Washington County
7
Weber County
7
Delta Region
6
Tushar Mountains
6
Cache County
5
Kaiparowits Plateau Region
5
Lincoln County
5
Navajo County
5
Wasatch County
5
Box Elder County
4
Mesa County
4
Montrose County
4
Daggett County
3
Davis County
3
Mohave County
3
Morgan County
3
Summit County
3
Uinta Basin (Utah and Colo.)
3
Apache County
2
Moffat County
2
Morgan County (Utah)
2
Rio Blanco County
2
Salina Quadrangle
2
San Juan County (Utah)
2
San Miguel County
2
Wasatch Plateau (Utah)
2
Westwater quadrangle
2
Alton Region
1
more ...