The CDP extends east to the Lake County/Flathead County line, which runs along the crest of the Swan Range.

Montana Highway 83 runs through the community close to the shore of Swan Lake; it leads northwest 20 miles (32 km) to Montana Highway 35 north of Bigfork and south 71 miles (114 km) to Montana Highway 200 at Clearwater.

Kalispell is 35 miles (56 km) northwest of Swan Lake via Highways 83, 82, and 93.

According to the U.S. Census Bureau, the Swan Lake CDP has an area of 7.6 square miles (19.7 km2), all land.

This Lake County, Montana state location article is a stub.