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- Rivers--Oregon 157
- Lumber trade 87
- Forests and forestry 53
- Lakes--Oregon 47
- Mountains--Oregon 45
- Portraits, Group 37
- Cities and towns 33
- Formations (Geology) 33
- Log transportation 33
- Coasts--Oregon 31
- Waterfalls 30
- Agriculture 26
- Bridges 23
- Sawmills 23
- Rodeos 22
- Logging 21
- Pendleton Round-Up 21
- Roads 19
- Railroad tracks 18
- Canyons 16