| SOURDOUGH MOUNTAIN LOOKOUT | |
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Developed in 1917 with a cupola cabin, the present L-4 ground cab was built in 1933 and is listed on the National Historic Lookout Register. It is staffed every summer. |
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| North Cascades National Park | |
| 2 miles northeast of Ross Dam | |
| Whatcom County, Washington | |
| Elevation 5985' | |
| Topozone | |
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