Mattoon Lake trout stocking
Kittitas County, Washington · lake
Mattoon Lake was last stocked 5 months ago (May 11, 2026). We have 9 stockings on record since Apr 1, 2025, 5 in the last 12 months (11,505 fish). Most stockings come in March and May. Species stocked: rainbow trout.
Last stocked
5 months ago
May 11, 2026
Next planned
Not announced
Last 12 months
5 stockings
11,505 fish
On record
9 stockings
since Apr 1, 2025
When is Mattoon Lake stocked?
Most stockings come in March and May. Stocked 4 times in 2026, mostly in March, usually on Mondays, about every 20 days.
By month, all years
Year by year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 1 | 2 | 1 | |||||||||
| 2025 | 1 | 1 | 1 |
What is stocked
| Species | Stockings | Fish | Fish per stocking | Typical size |
|---|---|---|---|---|
| Rainbow trout | 9 | 17,518 | 1,946 |
Stocking history
| Date | Species | Fish | Pounds | Hatchery |
|---|---|---|---|---|
| May 11, 2026 | Rainbow trout | 3,240 | 1,350 | Naches Hatchery |
| Mar 25, 2026 | Rainbow trout | 3,080 | 1,400 | Naches Hatchery |
| Mar 16, 2026 | Rainbow trout | 1,610 | 700 | Naches Hatchery |
| Feb 24, 2026 | Rainbow trout | 320 | 400 | Naches Hatchery |
| Feb 24, 2026 | Rainbow trout | 3,105 | 1,350 | Naches Hatchery |
| Oct 31, 2025 | Rainbow trout | 102 | 510 | Goldendale Hatchery |
| Oct 31, 2025 | Rainbow trout | 48 | 480 | Goldendale Hatchery |
| May 13, 2025 | Rainbow trout | 3,000 | 1,250 | Naches Hatchery |
| Apr 1, 2025 | Rainbow trout | 3,013 | 1,310 | Naches Hatchery |
From Washington fish and wildlife agency reports, collected nightly and kept after the agency takes them down. Agencies revise reports; check the agency's report before you go.
Other stocked waters in Kittitas County
- Kachess Lakelakestocked Sep 4, 2026
- Taneum Lakelakestocked Aug 29, 2026
- Mirror Lakelakestocked Aug 28, 2026
- Thorp Lakelakestocked Aug 3, 2026
- Twin Lakes Upperlakestocked Aug 3, 2026
- Lake Lillianlakestocked Jul 26, 2026
- Summit Chief Lakelakestocked Jul 18, 2026
- Talus Slope Lakelakestocked Jul 9, 2026
All stocked waters in Kittitas CountyStocked this week in Washington
Questions about Mattoon Lake
- When was Mattoon Lake last stocked?
- The latest reported stocking was May 11, 2026 (rainbow trout, 3,240 fish), according to Washington agency reports.
- How often is Mattoon Lake stocked?
- Stocked 4 times in 2026, mostly in March, usually on Mondays, about every 20 days. Across all years on record, most stockings come in March and May.
- What kind of trout are stocked in Mattoon Lake?
- Rainbow trout (9 stockings, 17,518 fish).