Every spring, WDFW clips small green tags behind the dorsal fins of trout stocked across more than 100 lakes. Catch one between opening day and Halloween, and it redeems for prizes donated by local businesses — gear, gift cards, trips, the occasional kayak. Entry costs nothing beyond your license.
Fishing snapshot
The Derby isn't a different fishery — it's the same planted-trout fishery with a prize layer. Tagged fish behave like every other stocked rainbow: fresh plants hold shallow and hit aggressively; older plants settle into drop-offs. Your edge is informational: pick derby lakes with recent big plants (the stocking report tells you), fish them within days of those plants, and cover water until you hook up. Every kept trout gets its dorsal area checked — that's all it takes.
Best for: anyone already planning opener trips or family lake days through summer.
Key takeaway: you can't target tagged fish specifically — but you can fish where they're densest and newest, which is exactly where the biting is best anyway.
The mechanics
- When: opens with lowland lakes season (fourth Saturday of April) and runs through October 31.
- Where: WDFW publishes the tagged-lake list each spring on the Derby page — over 100 lakes statewide, updated as seasons progress.
- How to enter: none required. Valid license + catching a tagged fish = eligible.
- Redemption: follow the tag's instructions — typically photographed in place and redeemed through a listed sponsor location.
Prizes vary by sponsoring business: tackle shop gift cards, rods, guided trips, resort stays. More than 900 prizes have been in play in recent years.
Choosing your derby water
Cross-reference three datasets, all free:
- The tagged-lake list — your candidate pool.
- The stocking plan and plant reports — find derby lakes with large recent plants; more fish = more tags swimming.
- Access reality-check — bank vs boat fit for your crew.
A 20-acre pond planted with 3,000 catchables last week beats a famous 500-acre lake planted in March, both for action and tag density.
Tactics by season phase
| Phase | Where tagged trout hold | Play |
|---|---|---|
| Opener–May | Shallow, near release points | Bobber-worm along banks; still-fish PowerBait |
| June–Aug | Drop-offs and thermocline depth | Slow-troll small spoons; lead-core or deep-set bait |
| Sept–Oct | Feeding up again, shallower mornings | Spinners at dawn; cast to rising fish |
Stocked rainbows aren't subtle: movement and freshness beat finesse. Cover water rather than perfecting one spot when nothing shows in 45 minutes.
Family strategy
The Derby's real genius is giving kids a treasure-hunt frame:
- Print the tagged-lake list and let kids circle candidates near home.
- Any landed trout becomes "check the tag!" theater — inspect together.
- Even tagless days produce dinner; the possibility costs nothing.
Pair a derby lake trip with the kids'-first-trout playbook and you get both outcomes in one morning.
Rules worth knowing
- Standard bag limits, size rules, and gear restrictions apply per lake — the Derby adds prizes, not permissions.
- Tagged fish must be legal-to-retain fish under that water's rules; check before keeping anything outside regulation.
- Verify current-season details on WDFW's Derby page each April — sponsor lists and lake rosters shift annually.
Sources Checked
- WDFW Trout Derby announcements — structure, timing, prize scope.
- WDFW stocking reports — plant sizes and timing context.