Lake McDonald, the largest lake in Glacier National Park, offers anglers a serene fishing experience amidst stunning mountain vistas. This 6,800-acre alpine lake stretches for 10 miles along the Going-to-the-Sun Road with a maximum depth of 70 feet and 22 miles of scenic shoreline. Known for its crystal-clear, cold waters, Lake McDonald provides excellent habitat for several trout species and kokanee salmon. The lake is fed by mountain streams and doesn't freeze over, allowing for year-round fishing opportunities, though the most productive period runs from late spring through early fall when water temperatures range from 50°F to 70°F. Because of its location within Glacier National Park, fishing here also offers the chance to experience some of Montana's most breathtaking natural scenery.
Learn what type of fish are at Lake McDonald and what's needed to catch them.
Oncorhynchus mykiss
Oncorhynchus clarkii
Salvelinus confluentus
Salvelinus namaycush
Coregonus clupeaformis
Prosopium williamsoni
Ptychocheilus oregonensis
Prosopium coulterii
Learn how to get on Lake McDonald. Uncover great fishing access points, boat ramps, and all the facilities you need for an unforgettable day on the water. Some locations shown may border or include private property. Always check property boundaries and applicable regulations before visiting. onWater's Public & Private Land layer can help you plan your access with confidence.
See public and private land boundaries along the water, turn on private parcels with owner details to know where permission is required, and find land-trust parcels that offer permitted fishing access.
What you need to float or boat Lake McDonald, and when to apply.
Glacier National Park
Registration · All boaters · Required year-round
Every watercraft launched in Glacier needs a free launch permit, issued after an invasive species inspection.
Checked Nov 4, 2026 with Glacier National Park
When using any type of watercraft to access a body of water, it is important to follow all federal, state, and local rules and regulations. These rules and regulations include boat permitting and licensing, invasive species inspections and stamps, life jacket and PFD rules, motor size and horsepower restrictions, noise limitations, restrictions on personal watercraft, and many more. Visit the web link below for the most current rules and regulations for this body of water.
All anglers 12 and over must possess a license.
This river has a variety of species and regulations, including potential floating and/or watercraft restrictions. Because this river is specially managed for species, seasons, angling methods, and watercraft, it is strongly encouraged you check all federal, state, and local regulations before fishing. Visit any of the links below, inquire locally, or contact a local fly shop to learn current regulations and restrictions.
Under the Montana Stream Access Law, the public may use rivers and streams for recreational purposes up to the ordinary high water marks. Although the law gives recreationists the right to use rivers and streams for water-related recreation, it does not give them the right to enter private lands bordering those streams or to cross private lands to gain access to streams without landowner permission. Montana's stream access law ensures public access to surface waters by public bridge or county road right-of-way. The width of a public bridge or public road right-of-way easement is the same as the public highway to which it is attached.
The onWater Fish app keeps this water's access points, species and conditions in your pocket, with the tools you use once you're there.
Download the map around Lake McDonald to use it offline when coverage drops.
Keep a private fishing journal for Lake McDonald to find where and when fish are biting for you.
Find drop offs, ledges, channels, points and shallow flats with Garmin depth charts in the app.
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See the best times to fish Lake McDonald and check the forecast before you go.
No forecast data available.
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