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Mountain Whitefish

Mountain Whitefish

Mountain Whitefish are native California salmonids found exclusively in the eastern Sierra Nevada drainages. They are bottom-oriented predators that school in groups of 5-20 fish near the bottom of streams and lakes, preferring large pools and deep runs.

Scientific Name: Prosopium williamsoni

Physical Characteristics:
  • These silvery, large-scaled fish have a prominent adipose fin, small ventral mouth, cylindrical body, and distinctive olive to dusky backs with scales often outlined in dark pigment.
  • Breeding males develop distinct tubercles on head and sides.
  • The largest California specimen came from Lake Tahoe at 51cm and 2.9kg.

What to know

Habitat Distribution

  • Found exclusively in the eastern Sierra Nevada drainages.
  • They inhabit clear, cold streams and rivers at elevations of 1,400-2,300 meters, as well as natural lakes.

Key Locations

  • Prime California locations include the Truckee River system, East Fork Carson River, East and West Walker rivers, Little Walker River, Independence Lake, and Lake Tahoe.
  • Current range includes the Lower, Little, and Upper Truckee, East Fork Carson, and East and West Walker river drainages.
  • Natural lakes including Tahoe, Independence, Cascade, and Fallen Leaf.

Specific Spots

  • Target them in deep pools (>1 meter), large runs, and areas with rocky or boulder bottoms in streams, or near the bottom in deep lake water.

Mountain Whitefish FAQ

Answers from onWater's species guide.

What are the best lures and bait for Mountain Whitefish in California?

Small jigs, spoons, and spinners. Natural baits include salmon e.g.gs, worms, and maggots fished on or near the bottom.

What flies work for Mountain Whitefish in California?

Small nymphs including weighted caddis larvae, stonefly nymphs, and midge patterns in moderate to slow current. Prince Nymph patterns are particularly effective.

When is the best time to fish for Mountain Whitefish in California?

January through September prime fishing months. Active year-round but avoid October through early December spawning period.

How do you catch Mountain Whitefish in California?

Fish on or near the bottom due to their bottom-oriented feeding habits. Focus on deeper pools and runs rather than shallow riffles in streams. In lakes, fish deep water near the bottom.

What do Mountain Whitefish eat?

Mountain Whitefish are bottom-oriented predators that feed primarily on aquatic insects using their subterminal mouths. Juveniles consume chironomid midge, blackfly, and mayfly larvae, while adults feed on mayfly, caddisfly, and stonefly larvae during summer.

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