Osborne Lks Fishing and Stocking
Mason County, Washington. The Washington Department of Fish and Wildlife lists 3 stockings here in the latest year of its data (Cutthroat and Rainbow Trout), the most recent on Oct 5, 2026. Stocked in April and October in two or more years.
2026 Stocking
| Date | Species | Fish | Size |
|---|---|---|---|
| Oct 5, 2026 | Cutthroat | 200 | Fingerling, 25.0 fish per pound |
| Oct 5, 2026 | Rainbow Trout | 250 | Fry, 11.3 fish per pound |
| Apr 9, 2026 | Rainbow Trout | 160 | Legals, 2.5 fish per pound |
2025 Stocking
| Date | Species | Fish | Size |
|---|---|---|---|
| Oct 15, 2025 | Rainbow Trout | 280 | Fry, 16.3 fish per pound |
| Sep 17, 2025 | Cutthroat | 200 | Fingerling, 27.2 fish per pound |
| Apr 2, 2025 | Rainbow Trout | 200 | Legals, 2.16 fish per pound |
2024 Stocking
| Date | Species | Fish | Size |
|---|---|---|---|
| Oct 1, 2024 | Rainbow Trout | 240 | Fry, 12.05 fish per pound |
| Oct 1, 2024 | Cutthroat | 200 | Fingerling, 23.0 fish per pound |
| Apr 3, 2024 | Rainbow Trout | 200 | Legals, 2.35 fish per pound |
Other Stocked Waters in Mason County
About This Data
Every row comes from the stocking information published by the Washington Department of Fish and Wildlife, checked Nov 3, 2026. The agency lists this water as “OSBORNE LKS (MASO)”. Species and sizes are given as the agency names them; a dash means the agency does not say.
More for Washington Anglers
Stocking dates and places can change without notice; check with the agency before a trip. ReelTourney is not affiliated with the Washington Department of Fish and Wildlife.