Region
Colorado
22
Florida
19
Wisconsin
15
United States
13
Utah
8
Pennsylvania
7
Alaska
6
Illinois
6
Jefferson County
6
Michigan
6
Missouri
6
North Carolina
6
Oklahoma
6
Oregon
6
Iowa
5
New Jersey
5
Texas
5
Arkansas
4
Georgia
4
Hawaii
4
Montana
4
Ohio
4
Wyoming
4
Massachusetts
3
New Mexico
3
Newberry Volcano
3
Puerto Rico
3
Saint Charles County
3
South Dakota
3
York County
3
Albemarle Sound Watershed (N.C. and Va.)
2
Arizona
2
Boulder County
2
Bradley River
2
Cedar Rapids
2
Comal County
2
Cumberland County
2
Gates of the Arctic National Park and Preserve (Alaska)
2
Gore Creek Watershed (Eagle County)
2
Grand Portage Reservation
2
Great Plains
2
Guanella Pass Region
2
Gwinnett County
2
Haskell County
2
Honey Creek State Natural Area (Tex.)
2
Horse Creek Watershed (Hardee County and De Soto County)
2
Idaho
2
Kahuku Region
2
Kobuk River Valley
2
Kobuk Valley National Park (Alaska)
2
more ...