Montana stocking report
Rock Island Lake
35 records Last stocked: August 1, 2023
The short answer
Rock Island Lake was last stocked on August 1, 2023: 13,720 Yellowstone Cutthroat Trout (2.54 in avg).
Location map
Rock Island Lake location context
Rock Island LakePark County Dailey LakePark County Sacajawea Park LagoonPark County Corner LakePark County Basin LakePark 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 Rock Island Lake? Also on record: Rock Island Lake (Elmore County, Idaho) · Rock Island Lake (Idaho County, Idaho)
Agency records
Full stocking history
| Date | Species | Fish | Size | Hatchery |
|---|---|---|---|---|
| August 1, 2023 | Yellowstone Cutthroat Trout | 13,720 | 2.54 in avg | Yellowstone River Trout Hatchery |
| July 20, 2020 | Yellowstone Cutthroat Trout | 13,700 | 2.83 in avg | Yellowstone River Trout Hatchery |
| July 17, 2017 | Yellowstone Cutthroat Trout | 10,000 | 2.2 in avg | Yellowstone River Trout Hatchery |
| July 14, 2014 | Yellowstone Cutthroat Trout | 13,700 | 2.5 in avg | Yellowstone River Trout Hatchery |
| August 2, 2011 | Yellowstone Cutthroat Trout | 13,700 | 2.2 in avg | Yellowstone River Trout Hatchery |
| July 22, 2008 | Yellowstone Cutthroat Trout | 13,700 | 2.35 in avg | Yellowstone River Trout Hatchery |
| August 2, 2005 | Yellowstone Cutthroat Trout | 13,700 | 2.3000000000000003 in avg | Yellowstone River Trout Hatchery |
| August 13, 2002 | Yellowstone Cutthroat Trout | 13,700 | 2.5 in avg | Yellowstone River Trout Hatchery |
| August 2, 1999 | Yellowstone Cutthroat Trout | 13,700 | 2.1 in avg | Yellowstone River Trout Hatchery |
| August 12, 1996 | Yellowstone Cutthroat Trout | 13,700 | 2.3000000000000003 in avg | Yellowstone River Trout Hatchery |
| August 9, 1993 | Yellowstone Cutthroat Trout | 13,700 | 2.2 in avg | Yellowstone River Trout Hatchery |
| August 13, 1990 | Yellowstone Cutthroat Trout | 13,663 | 1.8 in avg | Yellowstone River Trout Hatchery |
| August 3, 1988 | Yellowstone Cutthroat Trout | 1,263 | 2.1 in avg | Yellowstone River Trout Hatchery |
| August 13, 1987 | Yellowstone Cutthroat Trout | 13,723 | 1.8 in avg | Yellowstone River Trout Hatchery |
| August 18, 1984 | Yellowstone Cutthroat Trout | 13,700 | 2 in avg | Washoe Park Trout Hatchery |
| August 5, 1981 | Yellowstone Cutthroat Trout | 5,995 | 2 in avg | Yellowstone River Trout Hatchery |
| August 7, 1980 | Yellowstone Cutthroat Trout | 26,119 | 2 in avg | Yellowstone River Trout Hatchery |
| July 23, 1977 | Yellowstone Cutthroat Trout | 13,700 | 2 in avg | Yellowstone River Trout Hatchery |
| August 27, 1974 | Yellowstone Cutthroat Trout | 5,040 | 2 in avg | Yellowstone River Trout Hatchery |
| August 9, 1972 | Yellowstone Cutthroat Trout | 10,560 | 2 in avg | Yellowstone River Trout Hatchery |
| August 27, 1970 | Yellowstone Cutthroat Trout | 15,000 | 3 in avg | Yellowstone River Trout Hatchery |
| July 24, 1968 | Yellowstone Cutthroat Trout | 21,115 | 3 in avg | Yellowstone River Trout Hatchery |
| August 4, 1967 | Yellowstone Cutthroat Trout | 5,000 | 3 in avg | Yellowstone River Trout Hatchery |
| July 29, 1967 | Yellowstone Cutthroat Trout | 6,000 | 2 in avg | Yellowstone River Trout Hatchery |
| September 21, 1966 | Yellowstone Cutthroat Trout | 540 | 9 in avg | Yellowstone River Trout Hatchery |
| September 21, 1966 | Yellowstone Cutthroat Trout | 9,000 | 4 in avg | Yellowstone River Trout Hatchery |
| August 23, 1966 | Yellowstone Cutthroat Trout | 13,100 | 3 in avg | Yellowstone River Trout Hatchery |
| October 11, 1965 | Cutthroat Trout | 18,000 | 3 in avg | Yellowstone River Trout Hatchery |
| October 2, 1948 | Cutthroat Trout | 12,600 | Emigrant | |
| September 11, 1947 | Cutthroat Trout | 11,700 | 1 in avg | Emigrant |
| September 3, 1942 | Yellowstone Cutthroat Trout | 15,000 | 2 in avg | Emigrant |
| August 16, 1939 | Brook Trout | 4,000 | 3 in avg | Unknown |
| July 25, 1939 | Brook Trout | 3,000 | 3 in avg | Unknown |
| August 16, 1938 | Brook Trout | 15,600 | 3 in avg | Unknown |
| September 7, 1933 | Brook Trout | 7,800 | 2 in avg | Emigrant |
Records shown exactly as published by Montana Fish, Wildlife & Parks. An event missing here does not mean the water was not stocked - some plants go unreported or are published elsewhere.
Data source: Montana Fish, Wildlife & Parks. Last updated: .
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