Box Elder County, UT
Mantua Reservoir
ReservoirBox Elder County, UT
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About this water
Mantua Reservoir is a reservoir in Box Elder County, Utah. State records show it stocked 267 times between 2000 and 2026. The most-stocked species are rainbow trout, bear lake cutthroat trout and albino rainbow trout, with 4 more on record. 3,159,762 rainbow trout have gone in across 183 releases.
Stocking history
267 recorded stockings
| Date | Species | Number | Size | Hatchery |
|---|---|---|---|---|
| Feb 9, 2026 | Rainbow trout | 5,000 | 9.8" | — |
| Sep 30, 2025 | Rainbow trout | 10,000 | 10.4" | — |
| Mar 18, 2025 | Rainbow trout | 5,000 | 9.8" | — |
| Oct 28, 2024 | Rainbow trout | 3,246 | 10.2" | — |
| Oct 22, 2024 | Rainbow trout | 1,304 | 10.6" | — |
| Oct 18, 2024 | Rainbow trout | 250 | 10.6" | — |
| Sep 16, 2024 | Rainbow trout | 2,520 | 10.0" | — |
| Sep 12, 2024 | Rainbow trout | 2,688 | 12.5" | — |
| Apr 16, 2024 | Rainbow trout | 5,000 | 11.6" | — |
| Oct 3, 2023 | Rainbow trout | 531 | 10.0" | — |
| Sep 25, 2023 | Rainbow trout | 4,024 | 10.0" | — |
| Sep 25, 2023 | Rainbow trout | 5,487 | 10.0" | — |
Showing the 12 most recent of 267. Stocking records for Mantua Reservoir published by Utah Division of Wildlife Resources. Stocking does not guarantee fish are present. Check current regulations and access before you go. See the full Utah stocking report.
