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.

Make Finley Point at Flathead Lake State Park, located at the southern end of Flathead Lake, your base camp to enjoy the many activities in the area.

Fishing for Lake Trout and Lake Superior Whitefish is excellent. There's camping, hiking, swimming, and boating at the state park, along with golf, shopping, dining, entertainment and museums in nearby Polson.

Finley Point has 18 RV campsites and 4 boat camping slips with 50-amp electric hookups, plus 7 tent sites and 12 boat slips without electricity. Maximum RV Length varies by site. Please see ReserveAmerica website for details.

Bear resistant storage lockers are available. A joint state/tribal fishing license is needed for fishing at this park.

Elevation is 2,913 feet; park size is 28 acres.

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!

Unless you like your water COLD, the effective swimming season is June through September. Average water temps in June are in the 60s, 70s in July and August, and then back down again in September.

Summer air temperatures average in the mid-70s to mid-80s.

Swim Guide shares the best information we have at the moment you ask for it. Always obey signs at the beach or advisories from official government agencies. Stay alert and check for other swimming hazards such as dangerous currents and tides. Please report your pollution concerns so Affiliates can help keep other beach-goers safe.

Beach conditions change constantly, and it is never wise to swim in open water up to 48-hours after a heavy rain. Please use caution!

The description above was copied from or heavily based on Swim Guide, with permission.

More Information

• Swim Guide - Weather and water quality for Finley Point State Park - Flathead Lake and 8,000 other beaches.