Largest lakes & reservoirs in Canada 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 164 articles we have published for Canada lakes.
Thinking about booking a Canada lake vacation home rental, cabin or hotel?
Use our free interactive vacation rental map to search and compare multiple vacation properties at a glance. Enter a lake name, a state or city and then simply click on a listing to compare all similar properties, best rates and availability for your dates.Search results: Sort lakes by miles of shoreline
Below are lakes within Canada > Compared by longest shoreline length in miles. This list does not represent all lakes in Canada, only the 164 Canada lake articles we have published on the LakeLubbers website.
Lake name | Shoreline length in miles | Lake description |
---|---|---|
Lake Diefenbaker (Canada, Saskatchewan, Canada) |
472 mi | Also known as Diefenbaker Lake Lake Diefenbaker, the largest reservoir in southern Saskatchewan, is developing a reputation as a favorite vacationland for visitors from all over Can … |
Namakan Lake (Canada, Minnesota, Northeast Minnesota, Ontario, Canada, US Midwest Region, USA) |
285 mi | Also known as Namakan Reservoir Namakan Lake’s delights await the lucky visitor. Covering more than 24,000 acres with many small islands, about half of the lake is located in Minneso … |
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 … |
Lac Saint-Jean, QC (Canada, Quebec, Canada) |
210 mi | Also known as Lake Saint-John, Piekouagami Follow Quebec’s Saguenay River to Lake Saint John and you will follow a path carved by time and the impressive power of nature. The two waterways are … |
Lake Muskoka, ON (Canada, Ontario, Canada) |
177 mi | Also known as Muskoka Lake, Muskoka Lakes Region Lake Muskoka, located in Ontario’s Muskoka Lakes Region, is one of Canada’s most famous lakes. Actually a chain of lakes, Muskoka joins Lake Joseph an … |
Northern Light Lake (Canada, Ontario, Canada) |
177 mi | Sprawling and unspoiled, Northern Light Lake spreads across western Ontario’s Granite Shield like a blanket of water. The lake isn’t well-known; only … |
Okanagan Lake, BC (British Columbia, Canada, Canada) |
167 mi | Also known as Lake Okanagan Okanagan Lake, located in British Columbia’s Napa of the North Country, is a vacationer’s paradise. Its sheer size and convenient location make this w … |
Lesser Slave Lake, AB (Alberta, Canada, Canada) |
153 mi | Located 236 miles northwest of Edmonton in Alberta, Canada, Lesser Slave Lake’s more than 280,000 surface acres present a wonderful scenic recreationa … |
Last Mountain Lake, SK (Canada, Saskatchewan, Canada) |
135 mi | Also known as Long Lake A visit to Regina Saskatchewan wouldn’t be complete without a trip to Last Mountain Lake. The lake was named for a local Cree legend that the Great Sp … |
Lake Saint Clair, MI / Canada (Canada, Michigan, Ontario, Canada, Southeast Michigan, US Midwest Region, USA) |
127 mi | Also known as Lake St. Clair Heart-shaped Lake Saint Clair is the smallest body of water in the Great Lakes system. Tucked between Lake Huron to the north and Lake Erie to the sou … |
Kootenay Lake, BC (British Columbia, Canada, Canada) |
124 mi | Also known as Lake Kootenay Kootenay Lake’s deep, clear waters stretch over 60 miles and 96,000 acres, reflecting the icy peaks of Kokanee Glacier. The lake is beautiful, ringed … |
Bobs and Crow Lakes (Canada, Ontario, Canada) |
123 mi | A perfect destination to savor the character of the Rideau Lake District is Bobs and Crow Lakes. Located 50 miles north of Kingston, Ontario, the two … |