The Swan Range is a mountain range in western Montana in the United States. Its peaks typically rise to around 8,000 to 9,000 feet. The range is bounded by the South Fork Flathead River to the east, the Flathead River to the north and northwest, the Swan River to the west, and lie to the southwest of Glacier National Park, just south of the Canada–US bor…The Swan Range is a mountain range in western Montana in the United States. Its peaks typically rise to around 8,000 to 9,000 feet. The range is bounded by the South Fork Flathead River to the east, the Flathead River to the north and northwest, the Swan River to the west, and lie to the southwest of Glacier National Park, just south of the Canada–US border. It runs about 99 miles from north-northwest to south-southeast. Major cities near the Swan Range include Kalispell and Bigfork to the northwest, and Seeley Lake on the south.