Flathead Lake in northwest Montana is the largest natural freshwater lake west of the Mississippi; slightly larger than Lake Tahoe at 27.3 mi. long, 15.5 mi. wide, and max depth of 370.7 ft..  As one of the cleanest in the world, Flathead Lake is perfect for OPEN WATER SWIMMING!  No sharks, no jellyfish, and no lane lanes...just clear, clean, and crisp water!


Welcome to the home of FLOW Swimmers (Flathead Lake Open Water Swimmers), where THE LAKE is open year-round (when it's not frozen over)! Situated in Polson, MT on the lake's southern shore, FLOW Swimmers specialize in open water swimming.

"Clean, swimmable open water is my passion, and a portion of ALL of our proceeds go toward clean water initiatives on Flathead Lake."  In 2019, we continue our collaboration with the University of Montana's Flathead Lake Biological Research Station and the Confederated Salish & Kootenai Tribes on THE SWIM GUIDE project to sample and monitor the recreational water quality of Polson's designated swim beaches.  Our goal is to prevent water-borne illnesses from open water swimming.

A portion of our team dues support the SWIM GUIDE project Even if you're not a swimmer, please support this worthy cause.

FLOW Swimmers :: Flathead Lake Open Water Swimmers, Polson, MT 59860 :: 406-298-FLOW (3569) :: Coach@FlowSwimmers.com