Waterways of the Treasure State

Montana Lakes & Rivers

From the vast shores of Flathead Lake to the longest undammed river in the Lower 48 — Montana's waterways define its character, economy, and outdoor identity.

🌊
8+
Major Rivers
💧
3,000+
Natural Lakes
🏞️
197 sq mi
Largest Lake
🐟
692 mi
Longest River
Flathead Lake
Natural Lake

Flathead Lake

Montana's Inland Sea — Largest Natural Freshwater Lake West of the Mississippi

Size
30 miles long, 15 miles wide
Max Depth
370 feet max
Nearest City
Polson

Flathead Lake is the largest natural freshwater lake in the western United States, covering 197 square miles. Crystal-clear water — visibility to 30+ feet in places — laps against shorelines lined with cherry orchards, small resort communities, and the dramatic Mission Mountains to the east. The lake sits on the Flathead Indian Reservation, jointly managed by the Confederated Salish and Kootenai Tribes and state agencies.

Highlights

197 square miles — largest natural freshwater lake west of the Mississippi
Water so clear you can see 30+ feet deep in places
Famous for Flathead cherries — harvest in July draws visitors from across the region
Ringed by resort communities: Polson, Bigfork, Lakeside, Somers, and Rollins
Bull trout, lake trout, lake whitefish, yellow perch, and westslope cutthroat
Wild Horse Island State Park — accessible only by boat — hosts bighorn sheep and wild horses
Kerr Dam (now Seli'š Ksanka Ql'ispé Dam) is a 204-foot arch dam at the lake's outlet
The lake sits 2,893 feet above sea level

Activities

BoatingSailingKayakingFishingCherry picking (July)Wild Horse Island boat tours

Fishing

Bull trout (catch & release), lake trout, yellow perch, lake whitefish

Nearest City

Polson (south end), Bigfork (northeast), Kalispell (25 min north)

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Real Estate Nearby

Flathead Lake waterfront is among the most coveted real estate in Montana — lakefront lots and homes regularly trade at $1M–$10M+.

Whitefish Lake
Natural Lake

Whitefish Lake

The Jewel of Whitefish Resort Town

Size
7 miles long
Max Depth
70 feet max
Nearest City
Whitefish

Whitefish Lake sits just north of the charming resort town of Whitefish, backdropped by Whitefish Mountain Resort ski area and just 25 minutes from Glacier National Park. The lake is the focal point of one of Montana's most desirable resort communities, offering boating, swimming, paddleboarding, and fishing in a stunning mountain setting.

Highlights

City Beach in downtown Whitefish is one of Montana's most visited swimming beaches
Whitefish Lake Golf Club — scenic 36-hole course along the shoreline
Boat ramp access at City Beach and Whitefish Lake State Park
Excellent fishing for westslope cutthroat, bull trout, and lake whitefish
Luxury lakefront homes and condos surrounding the lake
Just 25 minutes from Glacier National Park's west entrance
Whitefish Lake Restaurant — iconic dining on the lakefront
Year-round recreation — winter ice fishing and snowshoeing

Activities

SwimmingBoatingPaddleboardingFishingGolf (lakeside)Ice fishing (winter)

Fishing

Westslope cutthroat trout, bull trout (C&R), lake whitefish, yellow perch

Nearest City

Whitefish (in town), Kalispell (15 min south)

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Real Estate Nearby

Lakefront properties on Whitefish Lake are among the most premium in Montana — median lakefront home prices exceed $2M.

Fort Peck Lake
Reservoir

Fort Peck Lake

One of the Largest Earth-Fill Dams in the World

Size
134 miles long
Max Depth
220 feet max
Nearest City
Glasgow

Fort Peck Lake, created by Fort Peck Dam on the Missouri River, is the fifth-largest reservoir in the United States by surface area — covering 245,000 acres with 1,520 miles of shoreline. Built during the New Deal (1933–1940), the dam provided critical employment during the Great Depression. Today the lake is an undiscovered gem for fishing, boating, and wildlife viewing.

Highlights

245,000 acres of water — the 5th largest reservoir in the US
1,520 miles of shoreline — more than California's Pacific Coast
Fort Peck Dam is one of the largest earth-fill dams ever built
Charles M. Russell National Wildlife Refuge surrounds the lake — 1.1 million acres
Pallid sturgeon recovery program — one of the rarest fish in North America
Walleye fishing is among the best in the entire country
Dinosaur fossil country — T-rex 'Sue' was found near the lake
Fort Peck Interpretive Center and Museum displays world-class fossils

Activities

Fishing (walleye, sauger, lake trout)BoatingCampingWildlife viewingFossil hunting

Fishing

Walleye, sauger, northern pike, lake trout, smallmouth bass, paddlefish (seasonal)

Nearest City

Glasgow (25 miles west), Fort Peck (on the lake)

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Real Estate Nearby

The Fort Peck area and Glasgow offer some of Montana's most affordable real estate — acreage at remarkable prices in a pristine natural setting.

Georgetown Lake
Reservoir

Georgetown Lake

A Mountain Gem Above 6,000 Feet

Size
3 miles long
Max Depth
20 feet avg
Nearest City
Anaconda

Georgetown Lake sits at 6,360 feet elevation in the Flint Creek Mountains, offering year-round recreation in a stunning alpine setting. The lake is a favorite for ice fishing in winter and known for its excellent rainbow trout fishing year-round. Ski Discovery resort is just minutes away.

Highlights

Sits at 6,360 feet elevation — one of Montana's highest lakes
Excellent ice fishing December through March
Rainbow trout fishery rated among the best in western Montana
Ski Discovery ski area is just 2 miles from the lake
Stuart Mill Bay has a popular swimming beach
Surrounded by Deerlodge National Forest
Warm springs inlet keeps part of the lake ice-free even in winter
Accessible via scenic Pintler Scenic Route (Hwy 1)

Activities

FishingIce fishingBoatingSwimmingSkiing (nearby)Snowmobiling

Fishing

Rainbow trout, brook trout, kokanee salmon

Nearest City

Anaconda (13 miles east), Butte (40 miles east)

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Real Estate Nearby

Anaconda offers Montana's most remarkable affordability — homes from $80K–$165K median with Georgetown Lake access and easy I-90 proximity.

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