Largest lakes & reservoirs in Glacier Country, MT by shoreline length
The length of the exterior shoreline around a lake is measured at the lake’s normal elevation. The shoreline length can be considerably shorter or longer when lake water levels are lower or higher than normal. A lake with many coves has a much longer shoreline than a lake of similar surface area that is nearly circular in shape.When known, the shoreline miles that we report in our statistics include only the lake’s exterior shoreline, and exclude the shorelines of islands located within a lake’s boundaries. In lakes with many islands, those islands’ combined shorelines may exceed a lake’s exterior shoreline.
You can find many of the world’s longest-shoreline lakes on LakeLubbers. Note: For some lakes, "Longest Shorelines" data is unknown or does not apply, so this table may display fewer lakes than the total 24 articles we have published for Glacier Country, MT lakes.
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Below are lakes within USA > US West Region > Montana > Glacier Country, MT > Compared by longest shoreline length in miles. This list does not represent all lakes in Glacier Country, MT, only the 24 Glacier Country, MT lake articles we have published on the LakeLubbers website.
Lake name  |
Shoreline length in miles |
Lake description |
|---|---|---|
| Lake Koocanusa, MT / Canada (British Columbia, Canada, Canada, Glacier Country, MT, Montana, US West Region, USA) |
249 mi | Also known as Koocanusa Lake, Koocanusa Reservoir In the far north of the United States, tucked into the northwestern end of Montana, is the long, narrow Lake Koocanusa. This lake is actually a man-ma … |
| Hungry Horse Reservoir (Glacier Country, MT, Montana, US West Region, USA) |
170 mi | Hungry Horse Reservoir in Montana’s Glacier Country offers a wealth of recreational opportunities to northwestern Montana visitors. The nearly 24,000- … |
| Flathead Lake, MT (Glacier Country, MT, Montana, US West Region, USA) |
161 mi | Carved out by the historic glaciers of the last ice age approximately 11,000 years ago, Flathead Lake is one of the largest natural freshwater lakes i … |
| Saint Mary Lake (Glacier Country, MT, Montana, US West Region, USA) |
23 mi | Also known as St. Mary Lake, Saint Mary's Lake, St. Mary's Lake At 3900 acres, Saint Mary Lake is the second-largest lake in Glacier National Park. Saint Mary Lake is one of the most visited lakes, because the popu … |
| Waterton Lakes (Alberta, Canada, Canada, Glacier Country, MT, Montana, US West Region, USA) |
18 mi | Also known as Chief Mountain Lake, Knights Lake, Kootenay Lakes “Where the mountains meet the prairies” is the motto of Waterton Lakes National Park, the home of three Waterton Lakes that straddle the Montana-Alber … |
| Echo Lake MT (Glacier Country, MT, Montana, US West Region, USA) |
16 mi | Tiny islands, curving coves and wide bays are part of the allure of northern Montana’s Echo Lake. Coupled with mountains, wildlife, and the smell of t … |
| Whitefish Lake, MT (Glacier Country, MT, Montana, US West Region, USA) |
16 mi | Surrounded by the Rocky Mountains, Whitefish Lake in Northwestern Montana spans 3,315 acres and is seven miles long. Created by a melted glacier, the … |
| Ashley Lake (Glacier Country, MT, Montana, US West Region, USA) |
14 mi | Also known as Ashley Lake Ashley Lake is a special treat in Montana’s Glacier Country. Several miles of gravel road are required to get to the lake’s shore, so it is never over … |
| Bowman Lake, MT (Glacier Country, MT, Montana, US West Region, USA) |
14 mi | Bowman Lake is located in the northwest corner of scenic Waterton-Glacier International Peace Park. The crystal clear waters of Bowman Lake reflect th … |
| Kintla Lake (Glacier Country, MT, Montana, US West Region, USA) |
13 mi | One of the most remote campgrounds that can be reached by car in Glacier National Park graces the shore of Kintla Lake. Beautiful Kintla Lake lies in … |
| Tally Lake (Glacier Country, MT, Montana, US West Region, USA) |
9 mi | Also known as Talley Lake Tally Lake, in Montana’s Glacier Country region, is fast becoming a favorite among the adventurous. Located 15 miles west of the town of Whitefish, th … |
| Seeley Lake, MT (Glacier Country, MT, Montana, US West Region, USA) |
8 mi | Tucked in the Clearwater Valley of western Montana lies a 1,025-acre body of water called Seeley Lake. This glacial lake is considered to be part of a … |