Osborne Lakes fish stocking
Mason County, Washington
Osborne Lakes in Mason County, Washington was last stocked on October 5, 2026 with 450 cutthroat trout fingerling and rainbow trout fry from Eells Springs. Across the 5 years shown here, WDFW released 3,250 fish in 15 separate stockings. Stockings here are most common in April, September, and October.
When Osborne Lakes gets fish
Stocking history
Washington reports the exact release date. Sizes for Washington are estimated from the reported fish-per-pound.
2026 · 610 fish
| Date | Species | Fish | Size | Type |
|---|---|---|---|---|
| Cutthroat Trout | 200 | 4.3″ | Fingerling | |
| Rainbow Trout | 250 | 5.6″ | Fry | |
| Rainbow Trout | 160 | 9.3″ | Catchable |
2025 · 680 fish
| Date | Species | Fish | Size | Type |
|---|---|---|---|---|
| Rainbow Trout | 280 | 5″ | Fry | |
| Cutthroat Trout | 200 | 4.2″ | Fingerling | |
| Rainbow Trout | 200 | 9.7″ | Catchable |
2024 · 640 fish
| Date | Species | Fish | Size | Type |
|---|---|---|---|---|
| Cutthroat Trout | 200 | 4.4″ | Fingerling | |
| Rainbow Trout | 240 | 5.5″ | Fry | |
| Rainbow Trout | 200 | 9.5″ | Catchable |
2023 · 640 fish
| Date | Species | Fish | Size | Type |
|---|---|---|---|---|
| Rainbow Trout | 240 | 5.6″ | Fry | |
| Cutthroat Trout | 200 | 4.6″ | Yearling | |
| Rainbow Trout | 200 | 9.5″ | Catchable |
2022 · 680 fish
| Date | Species | Fish | Size | Type |
|---|---|---|---|---|
| Cutthroat Trout | 236 | 4.6″ | Fingerling | |
| Rainbow Trout | 244 | 5.3″ | Fry | |
| Rainbow Trout | 200 | 9.1″ | Catchable |
Frequently asked questions
When was Osborne Lakes last stocked?
WDFW records show Osborne Lakes was last stocked on October 5, 2026 (2 days ago), with 450 cutthroat trout fingerling and rainbow trout fry.
What fish are stocked in Osborne Lakes?
Osborne Lakes has been stocked with cutthroat trout and rainbow trout in the years shown here (2022–2026).
When does Osborne Lakes usually get stocked?
Most fish have been stocked in April, September, and October. Exact dates change from year to year, so check back or see WDFW's official stocking page.
Do I need a license to fish Osborne Lakes?
Yes, anglers generally need a valid Washington fishing license. Check the current Washington fishing regulations for seasons, limits and any special rules for Osborne Lakes.
Other stocked waters in Mason County
Benson Lake
Isabella Lake
Island Lake
Melbourne Lake
Trails End Lake
Cady Lake
All 50 stocked waters in Mason County →
Source: WDFW Fish Plants (data.wa.gov). Stocked Lakes is not affiliated with Washington Department of Fish and Wildlife. Spot a problem? Let us know.