Flathead Lake
The largest natural freshwater lake west of the Mississippi, with cherry orchards on its shores and half of it on tribal land.
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The lake covers around 500 square kilometres, which makes it the largest natural freshwater lake in the western United States by surface area, and it is a remnant of a much larger glacial lake. The southern half lies within the Flathead Indian Reservation of the Confederated Salish and Kootenai Tribes, and fishing or recreating there requires a tribal permit rather than a state licence - a distinction visitors regularly get wrong. Cherry orchards line the eastern shore, kept from frost by the lake's thermal mass, with a short harvest in late July. Wild Horse Island, a state park in the lake, holds bighorn sheep and a few feral horses and is reachable only by boat.
What you actually see
- Around 500 square kilometres - the largest natural freshwater lake in the west.
- Cherry orchards on the east shore - harvested in late July.
- Tribal jurisdiction over the southern half - requiring tribal permits.
- Wild Horse Island - bighorn sheep, boat access only.
When to go
June to September; cherries in late July. A full day.
Honest expectations
Permits differ by which half of the lake you are on - get the right one. The water stays cold through summer. Public access points are limited; much of the shore is private. Wildfire smoke affects some late summers.
Nearby
Glacier National Park is north; the Mission Mountains rise east.
What to pack for Flathead Lake
Chosen from what this place is for. Tap a kit for the full checklist.
Opening times, ticket prices and seasonal closures change - check the official source before you go: official site.
