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Westslope cutthroat

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  • Information & Facts

    Species Name
    Westslope cutthroat
    (Oncorhynchus clarki lewisi)

    Common Names
    Westslope Cutthroat, Blackspotted Cutthroat, Intermontane Trout, Rocky Mountain Trout, Missouri River Trout

    Size Range
    Average 8-12 inches. Westslope cutthroat can grow up to 16+ inches in quality populations.

    State Record
    4.71 lbs; Angus Kerr; Abernathy Lake, Okanogan County; October 8, 2006

    Description
    The westslope cutthroat trout is another trout that is a popular game fish and it is one of three subspecies of cutthroat trout that occur in Washington.  It is also one of two cutthroat trout subspecies that are native to Washington.  The other two are coastal (native) and Lahontan (non-native).  Westslope cutthroat trout have an olive/bronze colored back and greenish-gold colored sides.  Some red coloration can be seen on the gill cover and body.  As with all cutthroat trout, they have the distinctive red slash mark on each side of their lower jaw and teeth on the back of their tongue.  Westslope spots are primarily above the lateral line and are few there, but quite numerous on the posterior region of the body as well as the on the dorsal, adipose, and caudal fins.  The westslope cutthroat trout got its name from being first described west of the Continental Divide.  The do however occur both east and west of the Continental Divide.

    Where to fish for Westslope cutthroat
    Westslope cutthroat trout can be found in lakes and rivers east of the Cascade mountain range. They prefer pristine headwater streams and alpine lakes. In the river environment, westslope cutthroat trout prefer to occupy deep, slow moving, boulder strewn, glides, along the river bank and the tails of slower moving pools.  Those westslope cutthroat trout that inhabit lakes can be found dispersed throughout the lake.  However, if other species are present, they will use the nearshore littoral areas.

    How to fish for Westslope cutthroat
    Westslope cutthroat trout are aggressive and opportunistic feeders, primarily preying on insects and other invertebrates.  This translates into them being a cooperative quarry for anglers. They love natural baits, with the best bait being nightcrawlers or a large garden worm.  Small wobbling spoons and spinners are also effective.  Fly anglers can be successful using streamers and nymphs as well as dry flies.

    In the spring and fall, when the water tends to be cooler, westslope cutthroat will be found near the surface, but they are wary and spook easily.  Spin-fishing with a small wet fly or midge and a spinning bubble works best.  As summer approaches and the water begins to warm, westslope cutts will seek deeper areas off points and drop-offs.  Try trolling with spoons or bait on a leader attached to cowbells or Davis-rigs.  During the summer months, shore anglers are successful using worms, cheese, and marshmallows.

    Remember, when handling any fish you intend to release, wet your hands first so you don’t take off the fish’s protective slippery coating.  Dry hands will remove the protective coating and make the fish vulnerable to bacterial or fungal infections, which can kill them.