Region
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San Bernardino County
2
San Joaquin Valley
2
Sequoia National Park (Calif.)
1
Snake River Plain (Idaho and Or.)
2
Snake River Region (Wyo.-Wash.)
3
Tennessee
1
Teton County
1
Texas
1
Tropics
1
United States
42
Upper Mississippi River National Wildlife and Fish Refuge
1
Utah
3
Virginia
1
Washington (State)
1
West (U.S.)
2
West Virginia
2
Wilderness Road
1
Wisconsin
1
Wyoming
2
Yellowstone National Park
1
Yosemite National Park (Calif.)
1
Yukon-Charley Rivers National Preserve
1
Yukon-Charley Rivers National Preserve (Alaska)
1