The Glacier National Park Tourist Trails, including the Inside Trail, South Circle Trail and North Circle Trail, were established in Glacier National Park to connect a series of tourist camps and hotels established by the Great Northern Railway between 1910 and 1915. Prior to the construction of the Going-to-the-Sun Road, these trails were the primary form of circulation within the park. The trail system includes a number of bridges.The three separate trail systems link Many Glacier, Two Medicine, Cut Bank, Saint Mary and Goathaunt ranger stations and visitor centers. Sites associated with the trail system include the Gunsight Pass Shelter, Packer's Roost, Pass Creek Snowshoe Cabin, Granite Park Chalet and the Ptarmigan Tunnel.North CircleThe North Circle Trail describes a loop: Many Glacier - Cosley Lake - Goathaunt - Fifty Mountain - Granite Park - Many Glacier. During the 1920s, tent camps were located at Cosley Lake, Goathaunt and Fifty Mountain, as well as at Red Eagle. The trail's summit follows the Ptarmigan Wall, and was cut and blasted from the cliffside, passing through the Ptarmigan Tunnel to avoid a lengthy detour around the arête. The Park Saddle Horse Company operated multi-day excursions along the trail from 1925, stopping in turn at each camp or chalet.
