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Mayfield Reservoir Fish Stocking

Lewis County, Washington · 1995–2026 on record

Source: Washington fish & wildlife agency· updated 2026-07-21

According to Washington fish & wildlife agency, Mayfield Reservoir was last stocked July 21, 2026 with Rainbow Trout. Mayfield Reservoir has 420 stocking records on file, spanning 1995–2026, with about 2,123,407 fish stocked over that period.

July 21, 2026
Last stocked
2,123,407
Fish stocked
5
Species
420
Stocking records

When Mayfield Reservoir is stocked

Mayfield Reservoir is typically stocked in summer, most often in May — 96 stocking events in that peak month.

How Mayfield Reservoir's stockings spread across the calendar year.

Angler's Field Guide

Fishing Tips & Stocking Guide for Mayfield Reservoir

Practical advice on fish behavior, recommended tackle, and state regulations for anglers fishing in Lewis County, Washington.

Post-Plant Behavior & Timing

Hatchery-raised fish are conditioned to pelleted feed and open raceways. Following a release into Mayfield Reservoir, they typically congregate in schools near public access points, boat ramps, or inlets for the first 24 to 48 hours while adjusting to natural water conditions.

Since Mayfield Reservoir was last stocked July 21, 2026, anglers visiting within 1 to 2 weeks of a reported event generally experience the highest activity before fish disperse into deeper cover.

State Regulations & Licensing

  • •Fishing License: A valid Washington freshwater fishing license is required for anglers age 16 and older.Purchase Washington license online →
  • •Official Rules & Limits: Bag limits, bait restrictions, and seasonal boundaries are set by Washington fish & wildlife agency.Official Washington regulations guidebook →
  • •Ethical Conservation: Use barbless hooks and keep fish submerged in water during unhooking.Trout Thermal Advisory: When water temperatures rise above 68°F (20°C), released trout face severe mortality from thermal exhaustion. Target warmwater species or fish early in the morning when lakes and streams warm up.

Recommended Tackle & Presentations

Techniques tailored to the species stocked in Mayfield Reservoir:

Stocked Trout Tactics

Use light 4–6 lb monofilament or fluorocarbon line. Float scented dough bait (PowerBait) 12–18" off bottom using a sliding slip-sinker rig with a size 14–16 treble hook. For active casting, throw 1/16 to 1/8 oz inline spinners (Panther Martin, Rooster Tail) or small spoons (Kastmaster) along drop-offs.

Kokanee & Salmon Tactics

Troll small dodgers followed by micro-hoochies or wedding ring spinners tipped with shoepeg corn. Use downriggers or lead-core line to reach cooler thermocline depths (typically 20–50 ft in summer).

Rainbow Trout Profile Tips

The most commonly targeted stocked trout in the country, taken on bait, spinners, and flies alike; a common first fish for new anglers.

Tiger Trout Profile Tips

Known for hitting lures and flies aggressively; a favorite for anglers seeking a distinctive, hard-fighting stocked trout.

Recommended Tackle for Mayfield Reservoir

Field-tested tackle and presentations matched to the species stocked here.

Hatchery Trout FavoriteBerkley

Berkley PowerBait Floating Trout Dough

Hatchery-raised trout are conditioned to pelleted scents; scented dough floated 12–18 inches off bottom consistently triggers strikes.

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Top Casting LurePanther Martin

Panther Martin Classic Teardrop Inline Spinner

The heavy convex blade spins instantly upon retrieval, sending vibration through the water that triggers aggressive reaction bites along drop-offs.

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Essential RiggingEagle Claw

Sliding Sinker & Treble Hook Rigging Kit

Sliding egg sinkers allow cautious trout to run with bait without feeling line drag, while size 14–16 treble hooks keep dough bait securely pinned.

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Kokanee & Salmon FavoriteMack's Lure

Mack's Lure Classic Wedding Ring Spinner

A classic Western trolling lure designed to be tipped with shoepeg corn and run behind a dodger in deep thermoclines.

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As an Amazon Associate, StockedWaters earns from qualifying purchases at no additional cost to you. Recommendations are chosen for hatchery-conditioned fish behavior and ethical rigging. We may receive a referral commission if you buy through these links. Read our editorial policy & standards.

Nearby stocked waters

Other stocked waters near Mayfield Reservoir, freshest activity first.

Goose Lake

13 mi

Lewis County · 2 species · 17 records

Last stocked July 2026

Green River

12 mi

3 species · 236 records

Last stocked June 2026

Riffe Lake

12 mi

Lewis County · 6 species · 227 records

Last stocked June 2026

Green River

12 mi

King County · 3 species · 156 records

Last stocked June 2026

Swofford Pond

7 mi

Lewis County · 8 species · 191 records

Last stocked May 2026

Carlisle Lake

10 mi

Lewis County · 4 species · 180 records

Last stocked April 2026

Stocking history

Most recent stockings first. Dates shown at the precision the agency reported.

DateSpeciesNumberSource
July 21, 2026Rainbow Trout2,800Washington fish & wildlife agency
July 14, 2026Rainbow Trout2,500Washington fish & wildlife agency
July 9, 2026Rainbow Trout2,500Washington fish & wildlife agency
July 8, 2026Rainbow Trout3,120Washington fish & wildlife agency
June 30, 2026Rainbow Trout3,320Washington fish & wildlife agency
June 23, 2026Rainbow Trout2,980Washington fish & wildlife agency
June 16, 2026Rainbow Trout3,560Washington fish & wildlife agency
June 10, 2026Rainbow Trout1,764Washington fish & wildlife agency
Show 42 more stocking records →
DateSpeciesNumberSource
June 10, 2026Rainbow Trout1,900Washington fish & wildlife agency
June 3, 2026Rainbow Trout1,872Washington fish & wildlife agency
June 3, 2026Rainbow Trout1,860Washington fish & wildlife agency
May 28, 2026Rainbow Trout5,940Washington fish & wildlife agency
May 28, 2026Rainbow Trout4,860Washington fish & wildlife agency
May 21, 2026Rainbow Trout5,400Washington fish & wildlife agency
May 5, 2026Rainbow Trout4,800Washington fish & wildlife agency
May 4, 2026Tiger Trout1,200Washington fish & wildlife agency
April 9, 2026Rainbow Trout5,200Washington fish & wildlife agency
April 2, 2026Rainbow Trout5,400Washington fish & wildlife agency
August 26, 2025Rainbow Trout2,560Washington fish & wildlife agency
August 20, 2025Rainbow Trout2,665Washington fish & wildlife agency
August 11, 2025Rainbow Trout2,526Washington fish & wildlife agency
August 5, 2025Rainbow Trout2,767Washington fish & wildlife agency
July 29, 2025Rainbow Trout2,660Washington fish & wildlife agency
July 23, 2025Rainbow Trout2,860Washington fish & wildlife agency
July 16, 2025Rainbow Trout3,160Washington fish & wildlife agency
July 8, 2025Rainbow Trout3,120Washington fish & wildlife agency
July 2, 2025Rainbow Trout3,460Washington fish & wildlife agency
June 25, 2025Rainbow Trout3,552Washington fish & wildlife agency
June 18, 2025Rainbow Trout1,700Washington fish & wildlife agency
June 17, 2025Rainbow Trout1,700Washington fish & wildlife agency
June 11, 2025Rainbow Trout3,915Washington fish & wildlife agency
June 4, 2025Rainbow Trout4,105Washington fish & wildlife agency
May 29, 2025Rainbow Trout4,400Washington fish & wildlife agency
May 22, 2025Rainbow Trout4,400Washington fish & wildlife agency
May 5, 2025Tiger Trout1,233Washington fish & wildlife agency
May 1, 2025Rainbow Trout4,800Washington fish & wildlife agency
April 10, 2025Rainbow Trout5,400Washington fish & wildlife agency
April 3, 2025Rainbow Trout2,100Washington fish & wildlife agency
April 3, 2025Rainbow Trout3,120Washington fish & wildlife agency
August 28, 2024Rainbow Trout2,500Washington fish & wildlife agency
August 21, 2024Rainbow Trout2,486Washington fish & wildlife agency
August 13, 2024Rainbow Trout2,380Washington fish & wildlife agency
August 7, 2024Rainbow Trout2,680Washington fish & wildlife agency
July 31, 2024Rainbow Trout2,920Washington fish & wildlife agency
July 24, 2024Rainbow Trout2,620Washington fish & wildlife agency
July 17, 2024Rainbow Trout3,320Washington fish & wildlife agency
July 10, 2024Rainbow Trout3,280Washington fish & wildlife agency
July 3, 2024Rainbow Trout3,420Washington fish & wildlife agency
June 26, 2024Rainbow Trout1,810Washington fish & wildlife agency
June 26, 2024Rainbow Trout1,810Washington fish & wildlife agency

The reporting agency did not include fish sizes for this water.

Showing 50 of 420 stocking records.

Frequently asked

When was Mayfield Reservoir last stocked?

According to Washington fish & wildlife agency, Mayfield Reservoir was last stocked July 21, 2026 with Rainbow Trout.

What fish species are stocked in Mayfield Reservoir?

Mayfield Reservoir is stocked with Rainbow Trout, Tiger Trout, Chinook Salmon, Brown Trout, and Cutthroat Trout.

What time of year is Mayfield Reservoir stocked?

Mayfield Reservoir is typically stocked in summer, most often in May.

How often is Mayfield Reservoir stocked?

Mayfield Reservoir has been stocked about 13 times a year — 420 recorded stockings between 1995 and 2026.

How many fish have been stocked in Mayfield Reservoir?

About 2,123,407 fish have been stocked in Mayfield Reservoir across 420 recorded events since 1995, per Washington fish & wildlife agency.

Do you need a fishing license to fish Mayfield Reservoir?

Yes, all anglers age 16 and older generally need a valid Washington freshwater fishing license. Always review current regulations from Washington fish & wildlife agency for site-specific rules, bag limits, or stamps.

How do you catch stocked trout in Mayfield Reservoir?

Freshly stocked trout in Mayfield Reservoir typically respond well to floating dough bait (such as PowerBait) floated 12–18 inches off bottom on light 4–6 lb leader, live nightcrawlers under a bobber, and small inline spinners or spoons retrieved along shorelines and drop-offs.

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