Flathead Lake Map
Flathead Lake is a lake in the United States, covering about 510 km² (197 sq mi), with a maximum depth of 113 m (371 ft). This map shows the lake outlined in blue on shaded relief, with the rivers, borders and towns around it.
How to read this map
Its surface lies about 882 m (2,894 ft) above sea level. Inflows include Flathead River and Swan River. It drains through the Flathead River.
The blue outline marks Flathead Lake as mapped by Natural Earth. Towns and cities on the map include Missoula, Kalispell and Polson.
Greens show lower elevations; tan and brown show higher land, with pale tones toward the highest terrain. Shadows emphasize the slopes, and vertical relief is exaggerated so landforms are easier to read. Dashed lines show country borders, and fine dashed lines show state or province borders.
The relief uses Terrain Tiles (SRTM, GMTED2010 and ETOPO1 elevation data). Rivers, lakes, borders and the outline of Flathead Lake come from Natural Earth, and the figures on this page from Wikidata. Natural Earth draws features at a small scale, so the outline is a guide to where Flathead Lake is, not a surveyed boundary.
Blank physical map
The blank version keeps the mapped features and removes the place labels. Download it for a geography worksheet or practice identifying the features.
Flathead Lake facts
| Fact | Value |
|---|---|
| Length | 44 km (27 mi) |
| Area | 510 km² (197 sq mi) |
| Maximum depth | 113 m (371 ft) |
| Surface elevation | 882 m (2,894 ft) |
| Inflows | Flathead River and Swan River |
| Outflow | the Flathead River |
| Countries | the United States |
Data sources and license
- Natural Earth (public-domain geography): Public domain.
- Terrain Tiles / Mapzen (SRTM, GMTED2010, ETOPO1): Open elevation data; source attribution retained.
- Wikidata (lengths, areas, countries and other facts): CC0 1.0.
Map design and rendered images: Atlas of Maps, CC BY 4.0. Source databases retain their own licenses; the map license does not replace them.
Maps of the countries: United States. Compare with the world rivers map.
Frequently asked questions
How big is Flathead Lake?
Flathead Lake covers about 510 km² (197 sq mi).
How deep is Flathead Lake?
Its maximum depth is about 113 m (371 ft).
Where is Flathead Lake?
Flathead Lake lies in the United States.
Can I download a blank map of Flathead Lake?
Yes. The blank version keeps the relief, rivers and borders and the highlighted lake but removes the place names. Both versions are free to download as PNG and as an A4 PDF.
Use this map
You can download, print and share this map for free, in class, in school projects, in presentations and on websites, as long as you credit the source: Flathead Lake Map · Atlas of Maps (atlasofmaps.com), license CC BY 4.0.
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