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Lost Lake Fishing and Stocking

Mason County, Washington. The Washington Department of Fish and Wildlife lists 9 stockings here in the latest year of its data (Cutthroat, Kokanee and Rainbow Trout), the most recent on Oct 9, 2026. Stocked in January, March, April, May, September and December in two or more years.

2026 Stocking

DateSpeciesFishSize
Oct 9, 2026Cutthroat2,000Fingerling, 25.0 fish per pound
Sep 28, 2026Rainbow Trout2,000Legals, 0.95 fish per pound
May 13, 2026Kokanee20,030Fry, 391.0 fish per pound
Apr 27, 2026Rainbow Trout2,425Legals, 1.16 fish per pound
Apr 1, 2026Rainbow Trout409Legals, 0.25 fish per pound
Mar 16, 2026Rainbow Trout2,370Legals, 2.31 fish per pound
Mar 9, 2026Rainbow Trout2,535Legals, 2.27 fish per pound
Jan 15, 2026Rainbow Trout75Legals, 0.23 fish per pound

2025 Stocking

DateSpeciesFishSize
Dec 12, 2025Cutthroat100Yearling, 0.53 fish per pound
Sep 26, 2025Rainbow Trout300Legals, 1.04 fish per pound
Sep 22, 2025Rainbow Trout2,000Legals, 0.93 fish per pound
Sep 15, 2025Cutthroat2,000Fingerling, 27.3 fish per pound
May 8, 2025Kokanee20,000Fry, 316.0 fish per pound
Apr 28, 2025Rainbow Trout2,450Legals, 1.04 fish per pound
Apr 9, 2025Rainbow Trout200Legals, 0.33 fish per pound
Mar 26, 2025Rainbow Trout200Legals, 0.33 fish per pound
Mar 17, 2025Rainbow Trout4,905Legals, 2.48 fish per pound
Jan 16, 2025Rainbow Trout75Legals, 0.17 fish per pound

2024 Stocking

DateSpeciesFishSize
Dec 5, 2024Cutthroat100Yearling, 0.67 fish per pound
Nov 4, 2024Rainbow Trout250Legals, 0.92 fish per pound
Sep 23, 2024Rainbow Trout2,004Legals, 0.93 fish per pound
Jul 9, 2024Rainbow Trout75Legals, 1.64 fish per pound
May 9, 2024Kokanee20,355Fry, 303.0 fish per pound
Apr 29, 2024Rainbow Trout2,460Legals, 1.0 fish per pound
Mar 28, 2024Rainbow Trout450Legals, 0.33 fish per pound
Mar 19, 2024Rainbow Trout4,915Legals, 2.8 fish per pound
Jan 11, 2024Rainbow Trout75Legals, 0.23 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 “LOST LK (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.