About Flathead Lake

One of the world’s finest lakes

Flathead Lake is one of the largest natural lakes in the world and is the largest natural freshwater lake west of the Mississippi. The Lake is primarily fed by the Flathead and Swan Rivers and the water quality is among the best in the world. Flathead is over 27 miles long and over 15 miles at its widest point and covers 191 square miles. The deepest part of the lake is 370 feet while the average depth is 164.7 feet.

There are over 25 fish species found in the Flathead River-Lake ecosystem, 10 species are native and 15 have been introduced.  Those fish species include Black Bullhead, Brook Trout, Brown Trout, Bull Trout, Kokanee, Lake Trout, Lake Whitefish, Largemouth Bass, Largescale Sucker, Longnose Dace, Longnose Sucker, Mottled Sculpin, Mountain Whitefish, Northern Pike, Northern Pike Minnow, Peamouth, Pumpkinseed, Pygmy Whitefish, Rainbow Trout, Redside Shiner, Slimy Sculpin, Smallmouth Bass, Westslope Cutthroat Trout, Westslope X Rainbow, White Sucker and Yellow Perch. (Source)

National Weather Service – Graphical Flathead Lake Forecast

 Wild Horse Island

Wild Horse Island, near Big Arm Bay, Flathead’s largest island, is a State Park on Flathead Lake.  It is famous for its herd of Rocky Mountain Bighorn sheep and several wild horses.

Captain Mike also offers guided tours to Wild Horse Island where you can hike and view the wildlife. Wild Horse Island has been a famous attraction due to its rich history of when the Salish-Kootenai Indians used it to keep horses from being stolen by other Indian tribes. View this video about Wild Horse Island.