Blackfeet camp at upper St. Mary Lake, c. 1916[1]

According to archeological evidence, Native Americans first arrived in the Glacier area some 10,000 years ago. The earliest occupants with lineage to current tribes were the Flathead (Salish) and Kootenai,[2] Shoshone, and Cheyenne. The Blackfeet lived on the eastern slopes of what later became the park, as well as the Great Plains immediately to the east.[3] The park region provided the Blackfeet shelter from the harsh winter winds of the plains, allowing them to supplement their traditional bison hunts with other game meat. The Blackfeet Indian Reservation borders the park in the east, while the Flathead Indian Reservation is located west and south of the park. When the Blackfeet Reservation was first established in 1855 by the Lame Bull Treaty, it included the eastern area of the current park up to the Continental Divide. To the Blackfeet, the mountains of this area, especially Chief Mountain and the region in the southeast at Two Medicine, were considered the "Backbone of the World" and were frequented during vision quests.[4] In 1895 Chief White Calf of the Blackfeet authorized the sale of the mountain area, some 800,000 acres (3,200 km2), to the U.S. government for $1.5 million, with the understanding that they would maintain usage rights to the land for hunting as long as the ceded strip will be "public land of the United States".[5] This established the current boundary between the park and the reservation.[6][7]

While exploring the Marias River in 1806, the Lewis and Clark Expedition came within 50 mi (80 km) of the area that is now the park.[9] A series of explorations after 1850 helped to shape the understanding of the area that later became the park. In 1885 George Bird Grinnell hired the noted explorer (and later well-regarded author) James Willard Schultz to guide him on a hunting expedition into what would later become the park.[10] After several more trips to the region, Grinnell became so inspired by the scenery that he spent the next two decades working to establish a national park. In 1901 Grinnell wrote a description of the region in which he referred to it as the "Crown of the Continent." His efforts to protect the land made him the premier contributor to this cause.[11] A few years after Grinnell first visited, Henry L. Stimson and two companions, including a Blackfoot, climbed the steep east face of Chief Mountain in 1892.[12]

In 1891, the Great Northern Railway crossed the Continental Divide at Marias Pass 5,213 ft (1,589 m), which is along the southern boundary of the park. In an effort to attract passengers, the Great Northern soon advertised the splendors of the region to the public. The company lobbied the United States Congress. In 1897 the park was designated as a forest preserve.[13] Under the forest designation, mining was still allowed but was not commercially successful. Meanwhile, proponents of protecting the region kept up their efforts. In 1910, under the influence of the Boone and Crockett Club,[14] and spearheaded by George Bird Grinnell and Louis W. Hill, president of the Great Northern, a bill was introduced into the U.S. Congress which designated the region a national park. This bill was signed into law by President William Howard Taft in 1910.[15] In 1910 Grinnell wrote, "This Park, the country owes to the Boone and Crockett Club, whose members discovered the region, suggested it being set aside, caused the bill to be introduced into congress and awakened interest in it all over the country".[16]

 Many Glacier Hotel on Swiftcurrent Lake

From May until August 1910, the forest reserve supervisor, Fremont Nathan Haines, managed the park's resources as the first acting superintendent. In August 1910, William Logan was appointed the park's first superintendent. While the forest reserve designation confirmed the traditional usage rights of the Blackfeet, the enabling legislation of the national park does not mention the guarantees to the Native Americans. The United States government's position was that with the special designation as a National Park the mountains ceded their multi-purpose public land status and the former rights ceased to exist as the Court of Claims confirmed it in 1935. Some Blackfeet held that their traditional usage rights still exist de jure. In the 1890s, armed standoffs were avoided narrowly several times.[17]

The Great Northern Railway, under the supervision of president Louis W. Hill, built a number of hotels and chalets throughout the park in the 1910s to promote tourism. These buildings, constructed and operated by a Great Northern subsidiary called the Glacier Park Company, were modeled on Swiss architecture as part of Hill's plan to portray Glacier as "America's Switzerland". Hill was especially interested in sponsoring artists to come to the park, building tourist lodges that displayed their work. His hotels in the park never made a profit but they attracted thousands of visitors who came via the Great Northern.[18] Vacationers commonly took pack trips on horseback between the lodges or utilized the seasonal stagecoach routes to gain access to the Many Glacier areas in the northeast.[19]

 Saint Mary Lake and Wild Goose Island

The chalets, built between 1910 and 1915, included Belton, St. Mary, Going-to-the-Sun, Many Glacier, Two Medicine, Sperry, Granite Park, Cut Bank, and Gunsight Lake. The railway also built Glacier Park Lodge, adjacent to the park on its east side, and the Many Glacier Hotel on the east shore of Swiftcurrent Lake. Louis Hill personally selected the sites for all of these buildings, choosing each for their dramatic scenic backdrops and views. Another developer, John Lewis, built the Lewis Glacier Hotel on Lake McDonald in 1913–1914. The Great Northern Railway bought the hotel in 1930 and it was later renamed Lake McDonald Lodge.[20] The Great Northern Railway also established four tent camps at Red Eagle Lake, Cosley Lake, Fifty Mountain and Goat Haunt. The chalets and tent camps were located roughly 10–18 miles apart, and were connected by a network of trails that allowed visitors to tour Glacier's backcountry on foot or horseback. These trails were also constructed by the railroad. "Because of a lack of federal funds Great Northern assumed financial responsibility for all trail construction during this period, but was eventually reimbursed as funding became available."[21] Today, only Sperry, Granite Park, and Belton Chalets are still in operation, while a building formerly belonging to Two Medicine Chalet is now Two Medicine Store.[22] The surviving chalet and hotel buildings within the park are now designated as National Historic Landmarks.[23] In total, 350 buildings and structures within the park are listed on the National Register of Historic Places, including ranger stations, backcountry patrol cabins, fire lookouts, and concession facilities.[24] In 2017, Sperry Chalet closed early for the season due to the Sprague Fire which subsequently burned the entire interior portions of the structure, leaving only the stone exterior standing. Due to damage, the chalet was closed indefinitely and while the exterior stonework was stabilized in the fall of 2017.[25] The rebuilding process was completed during the summers of 2018 and 2019,[26] and a reopening ceremony was held in February 2020.[27]

 Road construction along the Going-to-the-Sun Road with Going-to-the-Sun Mountain in the background, 1932

After the park was well established and visitors began to rely more on automobiles, work was begun on the 53-mile (85 km) long Going-to-the-Sun Road, completed in 1932. Also known simply as the Sun Road, the road bisects the park and is the only route that ventures deep into the park, going over the Continental Divide at Logan Pass, 6,646 ft (2,026 m) at the midway point. The Sun Road is also listed on the National Register of Historic Places and in 1985 was designated a National Historic Civil Engineering Landmark.[28] Another route, along the southern boundary between the park and National Forests, is US Route 2, which crosses the Continental Divide at Marias Pass and connects the towns of West Glacier and East Glacier.[29]

The Civilian Conservation Corps (CCC), a New Deal relief agency for young men, played a major role between 1933 and 1942 in developing both Glacier National Park and Yellowstone National Park. CCC projects included reforestation, campground development, trail construction, fire hazard reduction, and fire-fighting work.[30] The increase in motor vehicle traffic through the park during the 1930s resulted in the construction of new concession facilities at Swiftcurrent and Rising Sun, both designed for automobile-based tourism. These early auto camps are now also listed on the National Register.[22]