Mayfield Lake

This reservoir was formed by the construction of Mayfield Dam. It is managed for catchable rainbow trout and warmwater species. Tiger muskies were introduced in 1993 to help in controlling nuisance northern pikeminnow (squawfish) populations.

The lake is located about three miles west of Mossyrock. The big attraction is tiger musky fishing. The state record is currently over 31 pounds; larger ones are out there. The best tiger musky fishing is during the warmer months. Consult the current Sport Fishing Rules pamphlet for specific regulations at this lake.

Surplus hatchery Coho and fall Chinook may be placed in the lake for additional fishing opportunity. Yellow perch are also caught in fair numbers, and a few largemouth bass are present. Boating access is available at a Lewis County park just off of Highway US-12, at Ike Kinswa State Park, and at a private resort. There is fair shore fishing access at the state park and at the Mossyrock Trout Hatchery. Call Tacoma Power's toll free fishing line at 888-502-8690.

Two-pole fishing is NOT allowed

Shoreline access: Good - Public access limited.

Species you might catch

Lake information

County: Lewis
Acreage: 2021.90 ac.
Elevation: 428 ft.
Center: 46.545804, -122.530265
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Fishing resources

Catchable fish plants

Release Location: MAYFIELD RES (LEWI)
Stock Date	Species	Number Released	Number of Fish Per Pound	Facility
Jun 26, 2024	Rainbow	1,810	1.8	EELLS SPRINGS
Jun 18, 2024	Rainbow	3,900	1.96	EELLS SPRINGS
Jun 12, 2024	Rainbow	3,837	1.9	EELLS SPRINGS
Jun 5, 2024	Rainbow	4,080	23	EELLS SPRINGS
May 22, 2024	Rainbow	7,889	2.3	MOSSYROCK HATCHERY
May 22, 2024	Rainbow	570	1	MOSSYROCK HATCHERY
Apr 18, 2024	Rainbow	5,000	2.5	MOSSYROCK HATCHERY
Apr 11, 2024	Rainbow	5,000	2.5	MOSSYROCK HATCHERY
Apr 4, 2024	Rainbow	5,400	2.7	MOSSYROCK HATCHERY
Aug 23, 2023	Rainbow	2,420	1.21	EELLS SPRINGS

Fishing prospects calendar

Rainbow trout

Fishing success for Rainbow Trout is generally best in the spring when thousands of fish are stocked statewide, but they can be caught year-round in most waters with a little patience and persistence. Success remains high into June and gradually declines as water temperatures increase and fish move offshore to stay cool. Fish that escaped the spring harvest return to the nearshore areas in the fall as waters cool off. Some waters may also be stocked again in the fall further boosting catch rates.

Coastal cutthroat trout (resident)

Fishing is best for Coastal Cutthroat in the spring and fall. There is a summer lull as fish move offshore into deeper waters to escape the summer heat in July and August. Catch is lowest in the late-winter while adults are spawning in tributary streams.

Largemouth bass

Fishing improves throughout the spring as waters warm and fish move onshore, peaking during the spawn. Summer is a slight lull though dawn/dusk hours can be very good. Catch improves in Fall as waters cool, vegetation begins to die back, and prey becomes more available. Winter is the hardest time because fish are offshore and slow moving.

Yellow perch

Yellow Perch can be caught year-round. Fishing is best in the summer after they finish spawning in April-May. Fish can be readily angled through the summer from both the shore and boat. Catch begins to decline in the fall as water temperatures cool and fish move offshore forcing anglers to pursue them in boats. Successful fishing for Yellow Perch in the winter involves either targeting schools in deep water from boats or through the ice.

Brown bullhead

Fishing improves throughout the spring, peaking before the spawning period in May and June. Fishing may pick up in early Fall, followed by a decrease in action as waters cool. Winter is a difficult time to target this species.

Northern pikeminnow

Fishing success for Northern Pikeminnow increases in May and June as water temperatures increase, and generally peaks in late June, although fishing conditions can vary throughout the Columbia River. After a lull during the heat of summer, fishing success peaks again in late September-early October. Northern Pikeminnow congregate in rocky areas with fast currents near dams, islands, stream mouths, points, eddies, rows of pilings, and ledges or bars in the river. Sunrise, sunset, and night are generally the best fishing times. Studies show there are greater concentrations of Northern Pikeminnow in shallow water during low-light conditions.