Region
- Africa 2 results
- Africa, Southern 2 results
- Africa, West 2 results
- Alabama 6 results
- Alaska 2 results
- Alaska, Southeast 2 results
- Alberta 2 results
- America 6 results
- Aral Sea Region (Uzbekistan and Kazakhstan) 2 results
- Atlantic Coast (Canada) 2 results
- Atlantic Coast (New England) 2 results
- Australia 2 results
- Baltic Sea 2 results
- Bastrop County 2 results
- Bastrop County (Tex.) 2 results
- Beijing 2 results
- Bitterroot National Forest (Mont. and Idaho) 2 results
- Black Belt (Ala. and Miss.) 2 results
- Blue Mountains (OR and WA) 2 results
- Blue Mountains (Or. and Wash.) 2 results
- British Columbia 6 results
- Buffalo 2 results
- California 8 results
- California, Northern 2 results
- Cameroon 2 results
- Canada 14 results
- Cape Cod 2 results
- Cape Cod (Mass.) 2 results
- Carazo 2 results
- China 6 results
- Cuba 2 results
- Douglas County (Wis.) 2 results
- East (U.S.) 2 results
- Edgerton 2 results
- Edgerton (Wis.) 2 results
- Egypt 2 results
- England 12 results
- Ethiopia 2 results
- Eurasia 2 results
- Europe 8 results
- Europe, Western 4 results
- Florida 2 results
- France 2 results
- Fraser River 2 results
- Fraser River (B.C.) 2 results
- Germany 2 results
- Germany (East) 2 results
- Ghana 2 results
- Great Britain 24 results
- Great Plains 2 results more…