Other names: -
The mountain whitefish (Prosopium williamsoni) is a freshwater fish found across North America, particularly in cold, clear streams and lakes. It is recognized by its slender, cylindrical body and silvery color. A member of the salmon family, this species is prized in recreational fishing for its abundance and the challenge it presents. It feeds primarily on aquatic insects, small fish, and other benthic organisms, making it an important species in freshwater ecosystems.
Other names
-
Length
~25" (max 70)
Weight
~1" (max 3)
Water
Fresh
Water Temp
8-21° F
Depth
10 ft
Garden worms
Leeches
Maggots
Mayfly Nymphs
Mealworms
Salmon eggs
WormsSorry. Regulation data is empty
Mountain whitefish prefer cold, fast-moving streams and clear lakes with rocky or sandy bottoms
They are often found in deeper pools and riffles, where they search for food near the bottom
Their diet consists mainly of aquatic insect larvae, small fish, and other benthic invertebrates
During colder months, they may be found in slower, deeper waters where they are less active
Spawning occurs in late fall when temperatures drop, often in shallow, gravelly areas of streams
Mountain whitefish are known for their group spawning behavior, where many fish gather in one area to release eggs and milt
After spawning, the adults return to deeper waters, leaving the fertilized eggs to develop unattended
Juveniles typically remain in shallow waters, feeding on plankton and small invertebrates before moving to deeper habitats as they mature
