Whitewater adventures on the Middle Fork of the Flathead River along the southern border of Glacier National Park. Mostly Class II and III whitewater (medium whitewater with numerous waves, narrow passages, eddies and bends). Glacier Raft Company's ½ day whitewater trip is 8 river miles. Depending on river flow, this trip will take 2 ½ to 4 hours, including a short bus shuttle to the river and instruction and safety information.Glacier Raft Company's full day whitewater trip is 13 river miles. Including a bus shuttle to the river, instruction and safety information, and lunch along the river, this trip usually takes 5 to 6 hours.