Lost Lake (Government) — Boulder Mtn North Slope
Today’s report
Lost Lake (Government) — Boulder Mtn North Slope is a fair bet today. The DWR last stocked brook trout (299 fish) on July 13. Tonight's forecast: mostly clear, 29°F.
- calm, fishable weather
Current conditions
Stocking
Last stocked Jul 13, 2026 — brook trout (299 fish).
| Date | Species | Quantity | Avg length |
|---|---|---|---|
| Jul 13, 2026 | brook trout | 299 | 2.93" |
| Jun 23, 2025 | brook trout | 297 | 2.97" |
| Jun 24, 2024 | brook trout | 305 | 2.62" |
| Jul 10, 2023 | brook trout | 296 | 2.57" |
| Jul 7, 2022 | brook trout | 299 | 2.96" |
| Jul 6, 2021 | brook trout | 299 | 2.76" |
Best time to fish Lost Lake (Government) — Boulder Mtn North Slope
The DWR has stocked Lost Lake (Government) — Boulder Mtn North Slope 6 times over the last 4 seasons, and 100% of those plants landed in June, July — the freshest fish and the easiest bite usually follow within a week or two of a stocking.
Species
Location
Nearby waters (within ~25 mi):
Guides & shops for this water
From our independent directory — no booking relationship.
Regulations
No water-specific rules listed for this water in the current Utah Fishing Guidebook — statewide general rules and daily limits apply (trout limit 4, combined). Verify in the current guidebook before you fish.