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Stocked last season

Mackay Reservoir Fish Stocking

Custer County, Idaho · 2023 to 2026 on record

According to IDFG records, Mackay Reservoir has 33 stocking records on file across 3 species. The most recent stocking season represented is 2026.

Mackay Reservoir stocking
Mackay Reservoir photo
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33
Stocking records
806,365
Fish reported stocked
3
Species
2026
Latest season

Stocking activity by season

4 seasons on record, most in the 2024 (11 records). Click a bar to jump to that season below.

6 records
2026 · 181,797 fish
2023
2024
2025
2026

Stocking records per season (labelled by the season's end year). Idaho's source reports by season, so records aren't broken out by month.

Most-stocked species

Rainbow Trout 16 records
Rainbow Trout - Triploid 16 records
Cutthroat Trout - Yellowstone 1 record

Location

Exact coordinates not yet available · Custer County

Map not available yet
We don't have coordinates for this water on file.

Stocking history

Values shown exactly as the agency reported them; species names are normalized for search.

SpeciesFish stockedSizePhase
Rainbow Trout 168,042 Fingerling (3-6 inches) —
Rainbow Trout 4,218 Catchable (12-14 inches) —
Rainbow Trout 4,195 Catchable (6+ inches) —
Rainbow Trout 1,200 Adults —
Rainbow Trout - Triploid 2,067 Catchable (12-14 inches) —
Rainbow Trout - Triploid 2,075 Catchable (12-14 inches) —

A stocking record does not guarantee fish remain present or may legally be harvested. Check current Idaho fishing regulations →

Quick facts

Latest season 2026
Most stocked Rainbow Trout
Species Rainbow Trout, Rainbow Trout - Triploid, Cutthroat Trout - Yellowstone
County Custer
Seasons on record 2023 – 2026
Fish reported 806,365
Coordinates —

Data source

Compiled from public records published by the Idaho Department of Fish and Game. StockedSpots is independent and not affiliated with or endorsed by IDFG.

Source: Idaho Department of Fish and Game (IDFG). Data last checked September 1, 2026.
View IDFG source →

Frequently asked questions

IDFG records show Mackay Reservoir stocked with Rainbow Trout, Rainbow Trout - Triploid, Cutthroat Trout - Yellowstone.

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