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Coastal Cutthroat Trout
Photo: USFWS – Pacific Region, Public domain 
Yellow Perch
Photo: Heath Alseike, CC BY 2.0 
Walleye
Photo: Argyleist, CC BY 2.0 
Kokanee
Photo: USFWS Mountain-Prairie, CC BY 2.0
Washington lakes and reservoirs
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Mayfield Lake Fishing
A 2,022-acre Washington lake in Lewis County.
Pick for troutPiscifun Carbon X ultralight spinning reel28% OFFSale $57.99 Photo of Riffe Lake: Allan Cronin, CC BY-SA 2.0
Lewis County
Mayfield Lake in figures
Mayfield Lake holds 2,022 surface acres of water in Lewis County, per WDFW. WDFW records the lake at about 428 feet. The run to Morton, the closest town, is about 12 miles. WDFW manages it as mixed-species water managed with a trout emphasis. The WDFW plant report places its county in WDFW Region 5.
The WDFW and State Parks layers list no launch on it. Bank anglers have 3 shore fishing sites. It carries 9 Special Rules of its own. In 2026 the plant report lists 23 trout plants. WDFW rates shoreline access as good.
2,022surface acres
428 ftelevation
0launches
232026 plants
WDFW Fish Washington lake layers on geodataservices.wdfw.wa.gov (surface acres, elevation, management emphasis, shoreline access, species), USGS NHD outlines, Census 2023 places, retrieved October 31, 2026.
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Species the WDFW lake layer names at Mayfield Lake
For Mayfield Lake, our WDFW sources list the species below.
WDFW Fish Washington species layers (presence, not abundance), WDFW records and the 2026 trout plant report; retrieved October 31, 2026.
Access
Ramps on Mayfield Lake
No launch on Mayfield Lake appears in the access layers, so nearby ramps are shown.
Fishing Mayfield Lake from shore
- Mayfield Lake shore accessshore fishing site, 1000 feet of shore fishing north of the ramp
- Mayfield Lake shore access near Mossyrock (east)shore fishing site, 300 feet of shore fishing near the ramp
- Mayfield Lake shore access near Mossyrock (west)shore fishing site, Limited shore fishing near boat ramp
Other ramps near Mayfield Lake
- Barrier Dam boat launch on Mill CreekMill Creek, 6 miles west
- Swofford Pond boat launchSwofford Pond, 7 miles southeast
- Massey Bar boat launch on Cowlitz RiverCowlitz River, 15 miles southwest
WDFW Water Access Sites and Shore Fishing Sites layers (geodataservices.wdfw.wa.gov) and the Washington State Parks boat launch layer, retrieved October 31, 2026. A Discover Pass is needed to park at WDFW access sites and State Parks launches.
Level
Level reading for Mayfield Lake
421.84 ftforebay elevation at Mayfield Dam
USACE Northwestern Division water management data, MAY.Elev-Forebay.Inst.0.0.BEST, reading for October 31, 2026 PST, retrieved October 31, 2026; series datum not stated. Provisional.
Each Mayfield Lake figure names its agency and time.
Stocking
Fish planted in Mayfield Lake this year
Mayfield Lake has received 23 plants in 2026 totalling 72,001 fish.
- MAYFIELD ReservoirRainbow, 2,220 fish at 1.11 per pound, August 25, 2026, Mckernan Hatchery
- MAYFIELD ReservoirRainbow, 2,320 fish at 1.16 per pound, August 19, 2026, Mckernan Hatchery
- MAYFIELD ReservoirRainbow, 2,520 fish at 1.26 per pound, August 11, 2026, Mckernan Hatchery
- MAYFIELD ReservoirRainbow, 1,534 fish at 1.17 per pound, August 5, 2026, Mckernan Hatchery
- MAYFIELD ReservoirRainbow, 971 fish at 1.41 per pound, August 5, 2026, Mckernan Hatchery
- MAYFIELD ReservoirRainbow, 2,660 fish at 1.33 per pound, July 29, 2026, Mckernan Hatchery
- MAYFIELD ReservoirRainbow, 2,800 fish at 1.4 per pound, July 21, 2026, Mckernan Hatchery
- MAYFIELD ReservoirRainbow, 2,500 fish at 1.25 per pound, July 14, 2026, Mckernan Hatchery
WDFW Trout Plants report (rows January 2 to October 27, 2026), read October 31, 2026.
Limits
Limits that apply on Mayfield Lake
| Species | Daily limit and size | Season |
|---|---|---|
| Largemouth Bass | No min. size in lakes, ponds, and reservoirs. Only largemouth bass less than 12" may be retained, except 1 over 17" may be retained. Daily limit 5. | Lakes, ponds, and reservoirs: year-round; rivers, streams and beaver ponds: Sat. before Memorial Day through Oct. 31 |
| Smallmouth Bass | No min. size in lakes, ponds, and reservoirs. Only 1 smallmouth bass over 14" may be retained. Daily limit 10. | Lakes, ponds, and reservoirs: year-round; rivers, streams and beaver ponds: Sat. before Memorial Day through Oct. 31 |
| Walleye | Min. size 12" in lakes, ponds, and reservoirs. Daily limit 8. Only 1 over 22" may be retained. May be caught, retained, and released alive from a livewell until daily limit is in possession. | Lakes, ponds, and reservoirs: year-round; rivers, streams and beaver ponds: Sat. before Memorial Day through Oct. 31 |
| Channel Catfish | No min. size in lakes, ponds, and reservoirs. Daily limit 5. | Lakes, ponds, and reservoirs: year-round; rivers, streams and beaver ponds: Sat. before Memorial Day through Oct. 31 |
| Burbot (Freshwater Ling) | No min. size. Daily limit 5. | Lakes, ponds, and reservoirs: year-round; rivers, streams and beaver ponds: Sat. before Memorial Day through Oct. 31 (p.23 general rule for |
| Crappie, Northern Pikeminnow, Peamouth Chub, Perch, Suckers, Sunfish, | No min. size. No daily limit. | Lakes, ponds, and reservoirs: year-round; rivers, streams and beaver ponds: Sat. before Memorial Day through Oct. 31 |
| Grass Carp | Closed unless otherwise listed in Special Rules. | Closed |
| Kokanee | No min. size. Daily limit 10. When fishing with bait, all kokanee that are lawful to possess and are equal to or greater than the minimum size are counted as part of the daily limit whether kept or released. | Lakes, ponds, and reservoirs: year-round; rivers, streams and beaver ponds: Sat. before Memorial Day through Oct. 31 (p.23 general rule for |
| Tiger Muskellunge (Tiger Muskie) | Min. size 50". Daily limit 1. | Lakes, ponds, and reservoirs: year-round; rivers, streams and beaver ponds: Sat. before Memorial Day through Oct. 31 (p.23 general rule for |
| Whitefish | No min. size. Daily limit 15. | Lakes, ponds, and reservoirs: year-round; rivers, streams and beaver ponds: Sat. before Memorial Day through Oct. 31 (p.23 general rule for |
| Steelhead | Release all wild steelhead. Min. size 20". Daily limit 2. Open during salmon or game fish seasons unless as otherwise listed. | Open during salmon or game fish seasons unless as otherwise listed |
| Brown Trout, Cutthroat Trout, Rainbow Trout, Golden Trout, Tiger Trout | In lakes, ponds, and reservoirs: No min. size. Daily limit 5. | Year-round (statewide lake season, p.23) |
| Trout (combined rivers and lakes same day) | The combined daily limit for an angler that fishes in both rivers and lakes on the same day is 5 trout, no more than 2 may be from rivers. | see the pamphlet |
| Lake Trout | No min. size. No daily limit. | Lakes, ponds, and reservoirs: year-round; rivers, streams and beaver ponds: Sat. before Memorial Day through Oct. 31 (p.23 general rule for |
| Eastern Brook Trout (EBT) | No min. size. No daily limit. | Lakes, ponds, and reservoirs: year-round; rivers, streams and beaver ponds: Sat. before Memorial Day through Oct. 31 (p.23 general rule for |
| Dolly Varden/Bull Trout | Closed unless otherwise listed in Special Rules. | Closed |
Mayfield Lake follows the statewide freshwater tables except where the pamphlet names it.
Special Rules WDFW lists for Mayfield Lake
| Water as printed | Species | Rule and season |
|---|---|---|
| Mayfield Lake: from Mayfield Dam to Onion Rock Bridge CRC (563) | All species | Two-Pole not allowed. Columbia River Salmon and Steelhead Endorsement (CRSSE) required (ages 15 and older). |
| Mayfield Lake: from Mayfield Dam to Onion Rock Bridge CRC (563) | Trout | Min. size 8". Daily limit 10. Release wild cutthroat trout and wild rainbow trout. (Year-round) |
| Mayfield Lake: from Mayfield Dam to Onion Rock Bridge CRC (563) | Smallmouth bass | No min. size. Daily limit 15. Only 1 over 14" may be retained. (Year-round) |
| Mayfield Lake: from Mayfield Dam to Onion Rock Bridge CRC (563) | Largemouth bass | No min. size. Daily limit 10. Max. size 12", except 1 over 17" may be retained. (Year-round) |
| Mayfield Lake: from Mayfield Dam to Onion Rock Bridge CRC (563) | Channel catfish | No min. size. Daily limit 10. (Year-round) |
| Mayfield Lake: from Mayfield Dam to Onion Rock Bridge CRC (563) | Walleye | No min. size. Daily limit 16. Only 1 over 22" may be retained. (Year-round) |
| Mayfield Lake: from Mayfield Dam to Onion Rock Bridge CRC (563) | Other game fish | Statewide min. size/daily limit. (Year-round) |
| Mayfield Lake: from Mayfield Dam to Onion Rock Bridge CRC (563) | Salmon | Min. size 12". Daily limit 6. Up to 2 adults may be retained. Release all salmon other than hatchery Chinook and hatchery coho. (Sept. 1-Dec. 31) |
| Mayfield Lake: from Mossyrock Dam downstream to the Tacoma Power safety signs at Onion Rock Bridge located just below the dam | All species | CLOSED WATERS. |
Special Rules as printed in the 2026-2027 Washington Sport Fishing Rules (WDFW pamphlet, in effect July 1, 2026 to June 30, 2027), pamphlet page 86 (pamphlet PDF), read on eRegulations October 31, 2026.
Anglers 16 and older need a Washington Freshwater license ($39.95 resident, $115.85 nonresident for 2026-27) or a Combination license; salmon, steelhead and sturgeon also take a catch record card.
Limits and seasons as printed in the 2026-2027 Washington Sport Fishing Rules (WDFW pamphlet, in effect July 1, 2026 to June 30, 2027), PDF page 27 (pamphlet PDF; eRegulations statewide freshwater page), read October 31, 2026.
Compare
Measuring Mayfield Lake against its neighbours
The size leader in this set is Riffe Lake, 11,326 acres.
| Lake | Distance | Acres | Elevation | Launches | 2026 plants |
|---|---|---|---|---|---|
| Mayfield Lake | 2,022 | 428 ft | 0 | 23 | |
| Swofford Pond | 7 miles southeast | 216 | 781 ft | 1 | 5 |
| Newaukum Lake | 9 miles north | 17 | 2,983 ft | 0 | 0 |
| Carlisle Lake | 10 miles west | 22 | 496 ft | 0 | 8 |
| Riffe Lake | 12 miles southeast | 11,326 | 774 ft | 0 | 0 |
| Davis Lake (Lewis County) | 13 miles east | 16 | 943 ft | 0 | 0 |
WDFW Fish Washington lake layers, access layers and the 2026 trout plant report; retrieved October 31, 2026.
Nearby
Around the Mayfield Lake area
Lakes for a second day beyond Mayfield Lake
- Swofford Pond7 miles southeast
- Newaukum Lake9 miles north
- Carlisle Lake10 miles west
- Riffe Lake12 miles southeast
- Davis Lake (Lewis County)13 miles east
Where to buy worms, eggs and jigs for Mayfield Lake
- Great Falls Outdoors, Inc.bait and tackle shop, Centralia
- Fish Doctor Jigsbait and tackle shop, Chehalis
- Port of Anacortes, 266 Doty Dryad Rdmarina, Chehalis
- Radio Shack & Tri-Mountain Sportsbait and tackle shop, Morton
- Lost Creek Fly Shopfly shop, Onalaska
Guide boats working Mayfield Lake
- Jr's Sport Fishing & River Guidecharter, Chehalis, (360) 262-9584
- Clancy’s Guided Sportfishingfishing guide, Chehalis, (360) 880-0409
- West Coast Anglersfishing guide, winlock, (360) 219-3863
Washington towns handy to Mayfield Lake
- Morton12 miles
- Napavine18 miles
- Winlock20 miles
Counties that hold part of Mayfield Lake
- Lewis Countyseat: Chehalis
Piscifun
What Piscifun sells for a morning at Mayfield Lake
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Fish photos
How to tell one Mayfield Lake fish from another, by photo
Photo: USFWS – Pacific Region, Public domain
Photo: Heath Alseike, CC BY 2.0
Photo: Argyleist, CC BY 2.0
Photo: USFWS Mountain-Prairie, CC BY 2.0
Answers
Mayfield Lake, asked and answered for Evergreen State anglers
Which Washington county holds Mayfield Lake?
Drive toward Lewis County, about 12 miles from Morton.
How big is Mayfield Lake by the WDFW figure?
2,022 acres in the WDFW layer.
How many launches do the access layers show on Mayfield Lake?
No ramp is recorded for it in the layers we use.
Does Mayfield Lake hold trout?
Listed species: rainbow trout, coastal cutthroat trout, largemouth bass, tiger muskie, brown bullhead and yellow perch.
Which 2026-27 pamphlet rows govern Mayfield Lake?
Brown Trout, Cutthroat Trout, Rainbow Trout, Golden Trout, Tiger Trout: In lakes, ponds, and reservoirs: No min. size. Daily limit 5.; Year-round (statewide lake season, p.23). WDFW adds rules of its own for it in the limits band.
Which WDFW license does an out-of-state angler buy for Mayfield Lake?
Anglers 16 and older need a Washington Freshwater license ($39.95 resident, $115.85 nonresident for 2026-27) or a Combination license; salmon, steelhead and sturgeon also take a catch record card.
Has WDFW stocked Mayfield Lake this year?
Latest 2026 row: Rainbow, 2,220 fish at 1.11 per pound, August 25, 2026, Mckernan Hatchery.
Which tackle shop on our Washington list is nearest Mayfield Lake?
Great Falls Outdoors, Inc. is the nearest tackle stop we list in the same county.
Which agency reports the level of Mayfield Lake?
Check the level band; the source is USACE NWD water management (dataquery).
Load the truck for Mayfield Lake
Every WDFW fee and statewide limit sits one click away.