From the record
“The historical Winchester Lookout, located in the North Cascades in the U.S. state of Washington, provides views of the Northern Picket Range, Mount Baker, Mount Shuksan, Mount Larrabee, and Canadian peaks. The steep snowfields usually require an ice-axe well into July.”
Wikipedia article Winchester Mountain Lookout, CC BY-SA 4.0.
One of 74 National Register listings published here for Whatcom County · listed in 1987 · category: Structure · built in 1935.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service
