Mystery Lake (Lost Lake)
Daggett County · Northeastern region
Today’s report
We don't have live gauge or forecast data for Mystery Lake (Lost Lake) yet — check the stocking history and regulations below before you go.
Current conditions
Stocking
Last stocked Jul 15, 2026 — cutthroat trout (805 fish).
| Date | Species | Quantity | Avg length |
|---|---|---|---|
| Jul 15, 2026 | cutthroat trout | 805 | 1.98" |
| Jul 15, 2024 | cutthroat trout | 793 | 2.26" |
Species
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.