Flat Iron Lake Fish Stocking
Yakima County, Washington · 1996–2024 on record
According to Washington fish & wildlife agency, Flat Iron Lake was last stocked July 11, 2024 with Rainbow Trout. Flat Iron Lake has 15 stocking records on file, spanning 1996–2024, with about 10,018 fish stocked over that period.
When Flat Iron Lake is stocked
Flat Iron Lake is typically stocked in summer, most often in July — 8 stocking events in that peak month.
Angler's Field Guide
Fishing Tips & Stocking Guide for Flat Iron Lake
Practical advice on fish behavior, recommended tackle, and state regulations for anglers fishing in Yakima County, Washington.
Post-Plant Behavior & Timing
Hatchery-raised fish are conditioned to pelleted feed and open raceways. Following a release into Flat Iron Lake, 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 Flat Iron Lake was last stocked July 11, 2024, 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 Flat Iron Lake:
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.
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.
Cutthroat Trout Profile Tips
Known for being relatively easy to catch on dry flies, making it a favorite of western fly anglers; many subspecies are managed under catch-and-release rules to protect native populations.
Recommended Tackle for Flat Iron Lake
Field-tested tackle and presentations matched to the species stocked here.
Berkley PowerBait Floating Trout Dough
Hatchery-raised trout are conditioned to pelleted scents; scented dough floated 12–18 inches off bottom consistently triggers strikes.
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.
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.
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 Flat Iron Lake, freshest activity first.
Milk Lake
11 miKittitas County · 1 species · 2 records
Last stocked May 2026
Bumping Lake
7 miYakima County · 2 species · 78 records
Last stocked May 2026
Milk Pond
9 miKittitas County · 1 species · 27 records
Last stocked April 2026
Mal Lake
9 miYakima County · 2 species · 24 records
Last stocked August 2025
Cedar Lake
11 miYakima County · 1 species · 12 records
Last stocked August 2023
Swamp Lake
12 miYakima County · 1 species · 7 records
Last stocked July 2023
Stocking history
Most recent stockings first. Dates shown at the precision the agency reported.
| Date | Species | Number | Source |
|---|---|---|---|
| July 11, 2024 | Rainbow Trout | 711 | Washington fish & wildlife agency |
| July 11, 2021 | Rainbow Trout | 700 | Washington fish & wildlife agency |
| July 5, 2018 | Rainbow Trout | 700 | Washington fish & wildlife agency |
| July 6, 2015 | Rainbow Trout | 700 | Washington fish & wildlife agency |
| August 14, 2012 | Rainbow Trout | 396 | Washington fish & wildlife agency |
| August 7, 2012 | Rainbow Trout | 700 | Washington fish & wildlife agency |
| July 7, 2009 | Rainbow Trout | 750 | Washington fish & wildlife agency |
| August 15, 2007 | Rainbow Trout | 756 | Washington fish & wildlife agency |
Show 7 more stocking records →
| Date | Species | Number | Source |
|---|---|---|---|
| July 25, 2006 | Rainbow Trout | 720 | Washington fish & wildlife agency |
| July 1, 2004 | Rainbow Trout | 735 | Washington fish & wildlife agency |
| July 11, 2002 | Rainbow Trout | 693 | Washington fish & wildlife agency |
| August 24, 2000 | Rainbow Trout | 697 | Washington fish & wildlife agency |
| August 10, 1998 | Rainbow Trout | 352 | Washington fish & wildlife agency |
| August 15, 1996 | Cutthroat Trout | 700 | Washington fish & wildlife agency |
| August 1, 1996 | Rainbow Trout | 708 | Washington fish & wildlife agency |
The reporting agency did not include fish sizes for this water.
Frequently asked
When was Flat Iron Lake last stocked?
According to Washington fish & wildlife agency, Flat Iron Lake was last stocked July 11, 2024 with Rainbow Trout.
What fish species are stocked in Flat Iron Lake?
Flat Iron Lake is stocked with Rainbow Trout and Cutthroat Trout.
What time of year is Flat Iron Lake stocked?
Flat Iron Lake is typically stocked in summer, most often in July.
How often is Flat Iron Lake stocked?
Flat Iron Lake is stocked intermittently — 15 recorded stockings between 1996 and 2024.
How many fish have been stocked in Flat Iron Lake?
About 10,018 fish have been stocked in Flat Iron Lake across 15 recorded events since 1996, per Washington fish & wildlife agency.
Do you need a fishing license to fish Flat Iron Lake?
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 Flat Iron Lake?
Freshly stocked trout in Flat Iron Lake 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.