The Border to Polebridge river run on the Flathead River in Montana offers a scenic and challenging experience for intermediate to advanced paddlers. This section features several Class III and IV rapids, including Bonecrusher and Jaws, as well as logjams and sweepers that require careful navigation. The best time to float this section is typically from mid-June to mid-July, when water levels are between 3,000 and 6,000 cfs. It is recommended that paddlers have experience with technical rapids and scouting beforehand.