Rainbow Trout Stocked · 12 plants · last May 11, 2026 Best: dawn, dusk Mattoon Lake fishing
Mattoon Lake fishing has Rainbow Trout on the stocking report. Also recorded: Yellow Perch, Largemouth Bass, Pumpkinseed, and Common Carp. It is stocked about 6 times a year since 2025, most often in February and March. Species guides list dawn and dusk for Rainbow Trout, Largemouth Bass, and Common Carp, dawn, day, and dusk for Yellow Perch, and dusk for Pumpkinseed.
- Last stocked
- May 11, 2026
- · Rainbow Trout
- Plants on record
- 12
- Since 2025
- Species stocked
- 1 (+4 also recorded)
- Average size
- 13.8 in
- Surface acres
- 26.1
- Elevation
- 1,491 ft
Fish at Mattoon Lake
Around the dates Mattoon Lake is stocked, Open-Meteo's 2016-2025 archive puts mean air temperature at 40.6°F in March, 33.5°F in February, 58.3°F in May, 50.5°F in October. That is air temperature at these coordinates, not water temperature. Open-Meteo
Rainbow Trout Stocked · 12 plants · last May 11, 2026 Best: dawn, dusk 
Yellow Perch Confirmed present Best: dawn, day, dusk Best: dawn, day, dusk
Yellow Perch species guide
Largemouth Bass Confirmed present Best: dawn, dusk Best: dawn, dusk
Largemouth Bass species guide
Pumpkinseed Confirmed present Best: dusk Best: dusk
Pumpkinseed species guide
Common Carp Confirmed present Best: dawn, dusk Best: dawn, dusk
Common Carp species guideMattoon Lake is located near Ellensburg. The lake is also stocked with jumbo rainbow trout (1-1.5 lbs each) in the spring. Later in the fall, Mattoon is stocked with some large 6-12 lb rainbow trout broodstock. Anglers might catch common carp, largemouth bass, pumpkinseed sunfish, and yellow perch. (wdfw.wa.gov, accessed September 22, 2026)
Drafted by AI from the cited sources and checked before publishing.
How Mattoon Lake is stocked
About 868 reported fish per acre, 4th most of 7 lakes in Kittitas County with both a fish count and a surface area.
Fish stocked in 2025
11,293
Fish stocked in 2026
11,355
Stocking history
| Date | Species | Quantity | Avg. length | Source |
|---|---|---|---|---|
| May 11, 2026 | Rainbow Trout | 3,240 | 10.2 in | report |
| March 25, 2026 | Rainbow Trout | 3,080 | 10.6 in | report |
| March 16, 2026 | Rainbow Trout | 1,610 | 10.4 in | report |
| February 24, 2026 | Rainbow Trout | 320 | 14.5 in | report |
| February 24, 2026 | Rainbow Trout | 3,105 | 10.4 in | report |
| October 31, 2025 | Rainbow Trout | 102 | 23.5 in | report |
| October 31, 2025 | Rainbow Trout | 48 | 30 in | report |
| May 13, 2025 | Rainbow Trout | 3,000 | 10.2 in | report |
| April 1, 2025 | Rainbow Trout | 3,013 | 10.4 in | report |
| March 18, 2025 | Rainbow Trout | 1,840 | 10.4 in | report |
| March 3, 2025 | Rainbow Trout | 2,990 | 10.4 in | report |
| March 3, 2025 | Rainbow Trout | 300 | 14.5 in | report |
Access and facts
- Nearest town
- Ellensburg
- Facilities
- restrooms, dock
WDFW lake on the outskirts of Ellensburg. Bank access is good all around, though the lake gets weedy in summer.
Drafted by AI from the cited sources and checked before publishing.
Advisories, closures, regulations and water conditions change. Check the Washington Department of Fish and Wildlife before you go.
About Mattoon Lake
According to the Washington Department of Fish and Wildlife, this is a great place to take the family for a fun fishing outing. (wdfw.wa.gov, accessed September 22, 2026)
Drafted by AI from the cited sources and checked before publishing.
Nearest lakes
Common questions
What fish are at Mattoon Lake?
Fishing Mattoon Lake usually means Rainbow Trout. All 12 plants on record are Rainbow Trout. Rainbow Trout was last stocked May 11, 2026, averaging 13.8 in. Yellow Perch, Largemouth Bass, Pumpkinseed, and Common Carp are recorded here outside the stocking reports.
When is Mattoon Lake stocked?
Last stocked May 11, 2026. It is stocked about 6 times a year since 2025, most often in February and March. About 868 reported fish per acre, 4th most of 7 lakes in Kittitas County with both a fish count and a surface area.
How big are the fish stocked at Mattoon Lake?
Rainbow Trout stocked at Mattoon Lake average 13.8 in.
How do you get on Mattoon Lake?
The nearest town is Ellensburg. Facilities include restrooms and dock. WDFW lake on the outskirts of Ellensburg. Bank access is good all around, though the lake gets weedy in summer.
Which lakes near Mattoon Lake were stocked more recently?
Fiorito Lake North (3.4 mi) and Kiwanis Pond (22.6 mi) were stocked more recently. Fiorito Lake North is also stocked with Rainbow Trout and Kiwanis Pond is also stocked with Rainbow Trout.