Montana stocking report
Upper Mason Lake
11 records Last stocked: September 19, 2024
The short answer
Upper Mason Lake was last stocked on September 19, 2024: 500 Westslope Cutthroat Trout (2.09 in avg).
Location map
Upper Mason Lake location context
Upper Mason LakeMadison County Ruby River ReservoirMadison County Willow Creek ReservoirMadison County Upper Sureshot LakeMadison County Twin Lake (Upper)Madison 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.
Agency records
Full stocking history
| Date | Species | Fish | Size | Hatchery |
|---|---|---|---|---|
| September 19, 2024 | Westslope Cutthroat Trout | 500 | 2.09 in avg | Washoe Park Trout Hatchery |
| July 21, 2020 | Westslope Cutthroat Trout | 500 | 1.96 in avg | Washoe Park Trout Hatchery |
| July 26, 2016 | Westslope Cutthroat Trout | 500 | 1.68 in avg | Washoe Park Trout Hatchery |
| August 5, 2012 | Westslope Cutthroat Trout | 500 | 1.81 in avg | Washoe Park Trout Hatchery |
| July 28, 2008 | Westslope Cutthroat Trout | 500 | 1.28 in avg | Washoe Park Trout Hatchery |
| August 6, 2004 | Yellowstone Cutthroat Trout | 500 | 2.33 in avg | Yellowstone River Trout Hatchery |
| September 14, 2000 | Yellowstone Cutthroat Trout | 500 | 2.5 in avg | Yellowstone River Trout Hatchery |
| August 13, 1996 | Yellowstone Cutthroat Trout | 500 | 2.3000000000000003 in avg | Yellowstone River Trout Hatchery |
| July 30, 1992 | Yellowstone Cutthroat Trout | 500 | 1.9000000000000001 in avg | Yellowstone River Trout Hatchery |
| August 4, 1988 | Yellowstone Cutthroat Trout | 505 | 2.1 in avg | Yellowstone River Trout Hatchery |
| August 6, 1984 | Yellowstone Cutthroat Trout | 1,000 | 1 in avg | Washoe Park Trout Hatchery |
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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