At this time, I have learned about 18 sites used as fire lookouts, one training site and one roadside panoramic site. Only sites within the park boundary.
WillhiteWeb.com
Glacier National Park Lookouts
Bear Mountain (Crosley)
Heavens Peak
Huckleberry Mountain
Goat Haunt (Waterton Lake)
Loneman Mountain
Mount Brown
Alton Ridge
Elk Mountain
Curley Bear
Numa Ridge (Indian Ridge)
Granite Park Chalets
Red Eagle
Still Standing
Former
Roadside Panoramic
Riverview Mountain
Scalplock Mountain
Porcupine Ridge
Swiftcurrant
Reynolds Ridge
Sherburne Lake
Training Site
Glacier Park Garage
Heavens Peak Lookout
Loneman Mountain Lookout
Mount Brown Lookout
Numa Ridge Lookout (Indian Ridge)
Scalplock Mountain Lookout
Porcupine Ridge Lookout
Swiftcurrant Mountain Lookout
Bear Mountain Lookout (Crosley Ridge)
Huckleberry Mountain Lookout
Elk Mountain Lookout
Curley Bear Lookout
Granite Park Chalets
Red Eagle Lookout
Reynolds Ridge Lookout