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McDonald Lake is a lake located in Lake County, Montana, United States. It is most popular for fishing Bull trout and Westlope cutthroat trout.
Disclaimer: Always check local fishing regulations, water access rights and land ownership before fishing, regardless of any catches logged in that area by the Fishbrain community. Fishbrain has mapped millions of acres of government-owned land across the USA to help you identify potential fishing access, but you are responsible for ensuring compliance with all legal requirements.
Fishing regulations in Montana can change throughout the year. Make sure to check this page before fishing for the most up to date rules and regulations for the current season. Local regulations govern when you can fish, the max size of the fish you can keep, how many fish you can keep, and more.
Below you will see fishing regulations for catching Bull trout as of April 1st, 2026. To view regulations for a different fish species, please click on your preferred species in the drop-down.
It is unlawful to harvest, possess, land, purchase, sell, or exchange this species.
Hungry Horse Reservoir, Lake Koocanusa and part of the South Fork Flathead River are open for a regulated and experimental bull trout angling season. When fishing for bull trout each angler must have in possession a valid bull trout Catch Card for the specific water he/she is fishing. Anglers may select only one of the following areas: A) Lake Koocanusa, or B) Hungry Horse Reservoir and South Fork Flathead River. Swan Lake is open to angling for bull trout without a special permit but no harvest is allowed. All other waters are closed to intentional angling for bull trout year around.
For more information please see Bull Trout Regulations
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