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- Canyons 48
- Rivers--Oregon 29
- Formations (Geology) 4
- Roads 4
- Bridges 3
- Deschutes River (Or.) 3
- Forests and forestry 3
- Railroad tracks 3
- Geology--Oregon 2
- Basalt 1
- Firearms 1
- Footbridges 1
- Forest fires 1
- Horses 1
- Log transportation 1
- Mountains--England 1
- Mountains--Oregon 1
- Railroad bridges 1
- Rivers--Arizona 1
- Rivers--California 1