Flathead Lake

Open Water Swimmers


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...just clear, clean, and crisp water!

2015 International Vampire Swim

(Riverside Park, Flathead Lake, Montana)


400 cold water swimmers from around the world organized an international call for blood, and seven FLOW Swimmers answered the call by taking a plunge in Polson Bay and making a blood and monetary donation to the Red Cross.


Click here to see more:  2015 International Vampire Swim.

FLOWSWIMMERS :: Flathead Lake Open Water Swimmers, Polson, MT 59860 :: (303) 887-3930 :: Coach@FlowSwimmers.com