Mountain Whitefish
Mountain whitefish are widespread native salmonids found throughout Montana's cold, clear waters.
Scientific Name: Prosopium williamsoni
- Cylindrical fish typically measure 10-16 inches but can reach up to 5 pounds and live 7-18 years.
- They're distinguished by their pointed snout, small round mouth, and silver scales with olive undertones.
Fishing in Montana
Missouri River
Sun River
Smith River
Belt Creek
Marias River
Benton Lake
Holter Lake
Teton River
Dearborn River
Little Muddy Creek
What to know
Habitat Distribution
- Widely distributed across western drainages, eastern mountain front waters, and major rivers.
- They inhabit medium to large cold mountain streams, lakes, and reservoirs.
Key Locations
- Madison, Yellowstone, Missouri, Bitterroot, and Gallatin Rivers.
- The Madison and Yellowstone Rivers - described as 'whitefish factories' - plus numerous lakes and reservoirs throughout western Montana.
Specific Spots
- Target deeper pools and structures like boulders where they school.
Mountain Whitefish FAQ
Answers from onWater's species guide.
What flies work for Mountain Whitefish in Montana?
Small beadhead nymphs (sizes 14-22) including Prince Nymphs, Pheasant Tail, Hare's Ear, and Copper Johns. The Prince Nymph is particularly effective - described as 'whitefish candy.' Small flashy midge patterns also work well.
When is the best time to fish for Mountain Whitefish in Montana?
Fall through early spring when they're actively feeding. Winter offers excellent opportunities. Winter nymphing during stable weather produces consistent results.
How do you catch Mountain Whitefish in Montana?
Get flies deep along the bottom using sufficient split shot or tungsten putty, drifting at current speed. European nymphing methods and drop-shot rigs work effectively. The 'Dirty Pool' method of tipping flies with waxworms increases success.
What do Mountain Whitefish eat?
Diet consists primarily of aquatic insects (chironomids, mayfly nymphs, caddis larvae, stonefly nymphs), terrestrial insects, and zooplankton in lakes.
Where do Mountain Whitefish live in Montana?
Widely distributed across western drainages, eastern mountain front waters, and major rivers. They inhabit medium to large cold mountain streams, lakes, and reservoirs.
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