Sourdough Mountain is in North Cascades National Park in the U.S. state of Washington. The Sourdough Mountain Lookout, is a fire lookout that was built by the Civilian Conservation Corps in 1933 near the summit. The lookout was placed on the National Register of Historic Places in 1989.
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Address 00072, United States
Coordinates 48°45'7.464" N -121°7'41.441" E
