Range and Identity
The inventory retains Oncorhynchus clarkii lewisi. Its native drainage history includes waters on both sides of the Continental Divide, not simply everything west of it. Introduced populations and other cutthroat lineages should retain their own provenance rather than expanding this identity automatically.
Habitat and Behavior
Resident fish remain in streams, while other fish move between tributaries and larger rivers or lakes. Aquatic insects and zooplankton are important foods. These life-history differences help explain why one habitat or typical size does not describe every population equally well.
Food and Life History
Females place eggs in gravel nests, called redds, in flowing water during spring spawning. The six-to-sixteen-inch agency range is typical, not a maximum. A whole-species cutthroat record is not assigned to this specific lineage without supporting identification.
Field Note
Appearance can suggest an identity but may not reveal mixed ancestry. Preserve any genetic or stocking evidence when distinguishing a Westslope record from a cutthroat and Rainbow Trout hybrid.
All Lakes With Westslope Cutthroat Trout
Browse lakes and reservoirs with documented Westslope Cutthroat Trout records, listed alphabetically. Records do not establish current abundance or public access. Check the evidence and managing authority for the water you choose.
Showing 1–24 of 984 lakes · Page 1 of 41
- Ackley Lake Judith Basin, MT
- Acorn Lake Sanders, MT
- Airplane Lake Lemhi, ID
- Alidade Lake Elmore, ID
- Alkali Lake Spokane, WA
- Alpine Creek Lake #04 Blaine, ID
- Alpine Creek Lake #06 Blaine, ID
- Alpine Creek Lake #07 Blaine, ID
- Alpine Creek Lake #12 Blaine, ID
- Alpine Creek Lake #12A Blaine, ID
- Alpine Creek Lake #12B Blaine, ID
- Alpine Creek Lake #13 Blaine, ID
- Alpine Creek Lake #14 Blaine, ID
- Alturas Lake Blaine, ID
- Amber Lake Spokane, WA
- Amc Settling Pond #1 Deer Lodge, MT
- Amc Settling Pond #2 Deer Lodge, MT
- AMC Settling Pond #3 Deer Lodge, MT
- Anderson Lake Pend Oreille, WA
- Ansaldo Lake Stevens, WA
- Apex Lake Ferry, WA
- Arrowhead Lake Elmore, ID
- Ashley Lake Flathead, MT
- Azure Lake Elmore, ID