Flathead Lake is about 4 times bigger than Lake Norman.

Lake Norman is approximately 128 km² (49 sq mi), while Flathead Lake is approximately 510 km² (197 sq mi), making Flathead Lake 299% larger than Lake Norman.
Tip: This to-scale comparison of Lake Norman vs. Flathead Lake uses the Mercator projection, which distorts the size of regions near the poles.
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