About this map

This map is courtesy of Constellation Services, Helena MT. They create bathymetric maps of Montana lakes and reservoirs. Bathymetric maps show the depth contours of water formations. But these maps show much more, campgrounds, day use areas, boat launches, trails, and many other important features. GPS coordinates are provided for boat launches. A list of fish species present is also provided. We have broken the map into two parts. If you click on the top or bottom areas of the map you will see a LARGE version of the map, from which you can read all text.

Montana Fish, Wildlife & Parks offers a great website if you are planning a visit to Flathead Lake.

See Bathymetric Map from the Flathead Lake Biological Station of The University of Montana.

Flathead Lake Weather and Forecast