Flathead Lake in Montana, North America's largest freshwater ice-free lake, offers crystal-clear water and year-round recreation.

🧭Learn More
🗺️

Geography

ContinentNorth America
RegionPacific Northwest
SubregionNorthern Rockies
CountryUnited States
StateMontana
CountyLake County
DistrictFlathead Basin
Postal Code59901
TimezoneAmericaDenver
Latitude48.308
Longitude-114.159
Maps
🌘9:34 PM LOCAL TIME

Flathead Lake is a massive natural lake in northwest Montana, formed by glacial and geological processes. Spanning roughly 1863 km², it flows into the Flathead River and is fed by snowfall from the nearby Salish Mountains and smaller tributaries. The lake is renowned for its exceptionally clear water, which often exceeds 20 meters of visibility, and its relatively gentle southern and eastern shores, making it ideal for boating, swimming, and waterfront recreation. Surrounding communities like Bigfork, Polson, and Kalispell provide access points, amenities, and cultural attractions; meanwhile, parks, marinas, and resorts cluster along its shorelines. Whether you're paddleboarding on calm mornings, fishing for lake trout and whitefish, or exploring nearby trailheads and state parks, Flathead Lake offers a majestic and accessible alpine waterbody with year-round appeal.

All content was written by our AI and may contain a few mistakes. We may earn commissions on some links. Last updated: Sun Dec 14, 2025, 2:55 AM