Idaho stocking report
Cow Lake
29 records Last stocked: September 25, 2025
The short answer
Cow Lake was last stocked on September 25, 2025: 749 Triploid Rainbow Trout (Fry (0-3 inches)).
Location map
Cow Lake location context
Cow LakeBoise County North Fork Boise RiverBoise County Middle Fork Payette RiverBoise County Lowman PondsBoise County Horseshoe Bend Mill PondBoise County
Pins use the finest location published with the stocking record. County-level pins show area context, not an exact access point; confirm access and directions with the official agency source.
Looking for a different Cow Lake? Also on record: Cow Lake (Valley County, Idaho) · Cow Lake (Adams County, Washington)
Agency records
Full stocking history
| Date | Species | Fish | Size |
|---|---|---|---|
| September 25, 2025 | Triploid Rainbow Trout | 749 | Fry (0-3 inches) |
| July 31, 2023 | Triploid Rainbow Trout | 251 | Fry (0-3 inches) |
| July 31, 2023 | Triploid Rainbow Trout | 256 | Fry (0-3 inches) |
| September 15, 2021 | Triploid Rainbow Trout | 750 | Fry (0-3 inches) |
| October 1, 2019 | Triploid Rainbow Trout | 750 | Fry (0-3 inches) |
| September 11, 2017 | Triploid Rainbow Trout | 750 | Fry (0-3 inches) |
| September 12, 2015 | Triploid Rainbow Trout | 750 | Fry (0-3 inches) |
| September 11, 2013 | Triploid Rainbow Trout | 750 | Fry (0-3 inches) |
| August 24, 2011 | Triploid Rainbow Trout | 750 | Fry (0-3 inches) |
| October 1, 2008 | Westslope Cutthroat Trout | 300 | Fry (0-3 inches) |
| September 27, 2008 | Westslope Cutthroat Trout | 490 | Fry (0-3 inches) |
| August 28, 2005 | Westslope Cutthroat Trout | 750 | Fry (0-3 inches) |
| August 30, 2003 | Westslope Cutthroat Trout | 750 | Fry (0-3 inches) |
| August 15, 2001 | Westslope Cutthroat Trout | 750 | Fry (0-3 inches) |
| August 26, 1999 | Westslope Cutthroat Trout | 500 | Fry (0-3 inches) |
| August 13, 1997 | Westslope Cutthroat Trout | 750 | Fry (0-3 inches) |
| August 19, 1994 | Westslope Cutthroat Trout | 400 | Fry (0-3 inches) |
| August 22, 1991 | Westslope Cutthroat Trout | 750 | Fry (0-3 inches) |
| August 25, 1988 | Westslope Cutthroat Trout | 750 | Fry (0-3 inches) |
| August 9, 1984 | Westslope Cutthroat Trout | 698 | Fry (0-3 inches) |
| August 16, 1981 | Cutbow - Cutthroat x Rainbow Trout - Diploid | 700 | Fry (0-3 inches) |
| August 16, 1981 | Cutbow (Cutthroat × Rainbow Trout) | 700 | Fry (0-3 inches) |
| July 30, 1978 | Cutthroat Trout | 715 | Fry (0-3 inches) |
| July 23, 1977 | Cutthroat Trout | 940 | Fry (0-3 inches) |
| August 15, 1975 | Cutthroat Trout | 1,532 | Fry (0-3 inches) |
| August 18, 1974 | Cutthroat Trout | 784 | Fry (0-3 inches) |
| July 25, 1973 | Cutthroat Trout | 1,446 | Fry (0-3 inches) |
| August 9, 1972 | Cutthroat Trout | 1,950 | Fry (0-3 inches) |
| September 9, 1969 | Cutthroat Trout | 2,000 | Fry (0-3 inches) |
Records shown exactly as published by Idaho Department of Fish and Game. An event missing here does not mean the water was not stocked - some plants go unreported or are published elsewhere.
Data source: Idaho Department of Fish and Game. Last updated: .
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