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- Glacial crevasses 28
- Glaciers 18
- Mountains 17
- Ice 15
- Mountaineers 12
- Snow 12
- Three Sisters (Or.) 8
- Hood, Mount (Or.) 6
- Mountaineering 5
- Mountains--Oregon 5
- Three Sisters Wilderness (Or.) 3
- Mountains--Washington (State) 2
- Nature 2
- Mazamas (Portland, Or.) 1
