Lake Merwin is a reservoir in Washington, near Clark County.
Lake Merwin is a reservoir in Clark County, Washington and holds roughly 422,000 acre-feet.
The recorded size of Lake Merwin is missing; fish one short bank carefully before deciding whether a wider search makes sense.
Lake Merwin is the lowest large reservoir in the Lewis River chain and is best known for kokanee. Forested points, creek arms, deep open water, and seasonal drawdown set the pattern.
Locate kokanee before setting a trolling depth, then use small spoons or spinners behind a compact attractor rather than running one fixed depth all day.
Merwin is lower and generally warmer than Yale and Swift. The Speelyai side and main Lewis channel deserve separate passes when water color changes.
After the first bite on Lake Merwin, note whether it came from moving water, rock, weeds, wood, or open water because that one detail is more useful than a broad report from another end of the lake and tells you what kind of feature to repeat nearby.
Keep Lake Merwin's open-water fish and shoreline fish on separate passes because the main targets here include kokanee salmon, rainbow trout, coastal cutthroat trout and northern pikeminnow, and those fish do not all use the same cover, depth, or lure speed even when they are feeding in the same part of the lake.
Before leaving Lake Merwin, compare the best feature at two nearby depths and change lure speed once so that short check shows whether the problem is the location or the presentation without turning the rest of the trip into random casting.
Fish listed for Lake Merwin include Kokanee Salmon, Rainbow Trout, Coastal Cutthroat Trout, and Northern Pikeminnow.
During a return to the best bank near a quiet corner near firm bottom, cast a small spoon, inline spinner, light jig, or fly through cool water for rainbow trout.
During a check of nearby water near a channel bend under flat light, start where two things meet: weeds and open water, rock and mud, a point and a drop, or clear water and dirty water; fish that edge at more than one depth before leaving it.
While using a simple two-depth check near a shallow shelf where food is present, spring runoff can add color and pull fish toward fresh water; green weeds and the first drop become stronger summer targets; in fall, follow bait toward points and shallow flats, while winter rewards a slower search.
During a cool spring morning near a protected point near visible bait, a light spinning rod, thin line, a few small spoons, inline spinners, and jigs cover the listed trout; carry one slightly heavier setup when other fish or windy water call for more control.
During a cold winter outing near a soft-to-hard bottom change where food is present, record the wind, water color, depth that held fish, and cover after a bite; those four notes are more useful on the next trip than a long list of spots that did not produce.
During a warm summer afternoon near a shaded bank with stable weather, keep the first hour simple: use one moving bait to find active fish, slow down with a jig or natural bait on the best edge, and repeat the same setup when two bites come from matching depth and bottom during that part of the trip.
The main difference is easy to see: Lake Merwin is the lowest large reservoir in the Lewis River chain and is best known for kokanee.
Start simply: Locate kokanee before setting a trolling depth, then use small spoons or spinners behind a compact attractor rather than running one fixed depth all day.
Watch this closely: Merwin is lower and generally warmer than Yale and Swift.
Explore nearby waters, including local Featured destinations. Check each page for access and fishing restrictions.
Distances are straight-line estimates between mapped water locations.