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Idaho Fish and Game

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Rainbow trout stocking schedule for August 2026 in the Magic Valley Region

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Approximately 20,580 catchable-sized rainbow trout will be stocked in area waters in August

Hatchery personnel from Fish and Game’s Magic Valley Region will be stocking approximately 20,580 10-12” catchable-sized rainbow trout in August. The stocking date and numbers of fish are approximate.

Stocking of all waters is tentative and dependent on river/lake/pond conditions (angler safety concerns); dates may change due to weather or staffing constraints.

Body of WaterWeek to be StockedNumber to be Stocked
Castle Rocks State Park Fishing PondAug 3-7750
Crystal Springs LakeAug 3-7600
Niagrara SpringsAug 3-7500
Hagerman WMA Oster Lake #1Aug 3-7225
Hagerman WMA Riley Creek PondAug 3-7225
Big Smoky CreekAug 3-71,200
Freedom Park PondAug 3-7500
South Fork Boise RiverAug 3-7475
Hagerman WMA Oster Lake #1Aug 10-14225
Hagerman WMA Riley Creek PondAug 10-14225
Big Trinity LakeAug 10-141,200
Little Trinity LakeAug 10-14475
Big Wood RiverAug 10-14950
Gavers LagoonAug 10-14715
North Fork Big Wood RiverAug 10-14250
Trail Creek Aug 10-14350
Warm Springs CreekAug 10-141,425
South Fork Boise River, Featherville to Shake CreekAug 17-21950
South Fork Boise River, Shake Creek to Skeleton CreekAug 17-211,000
South Fork Boise River, Pine to Grouse CreekAug 17-21950
Hagerman WMA Oster Lake #1Aug 17-21225
Hagerman WMA Riley Creek PondAug 17-21225
Freedom Park PondAug 17-21500
Rock CreekAug 17-211,000
Fourth Fork Rock CreekAug 17-21325
Featherville Dredge PondAug 17-211,000
Hagerman WMA Oster Lake #1Aug 24-28225
Hagerman WMA Riley Creek PondAug 24-28225
Big Wood RiverAug 24-28950
Gavers LagoonAug 24-28715
North Fork Big Wood RiverAug 24-28225
Trail Creek Aug 24-28350
Warm Springs CreekAug 24-281,425

For maps of these fishing locations and other angling destinations, please visit the Idaho Fish Planner.

Most Idaho waters are open to fishing year-round, but some may have slightly different rules.

Be sure to pick up a copy of the 2025-2027 Fishing Seasons and Rules Booklet, which outlines season dates, special regulations, and bag limits at any Idaho Fish and Game regional office or most sporting goods stores statewide.