Region
United States
35
Alaska
6
Admiralty Island National Monument Wilderness (Alaska)
3
Arizona
3
California
3
Montana
3
Butte
2
Greens Creek
2
Boulder County
1
Butte (Mont.)
1
Canada
1
Colorado
1
Crown Jewel Mine (Wash.)
1
Nevada
1
Northwest, Pacific
1
Okanogan County
1
Ontario
1
Santa Rita Mountains
1
Silver Bow County
1
Washington (State)
1
West (U.S.)
1
Yavapai County
1
Zonia Mine (Ariz.)
1