Mirror Lake (Z-3) fishing
Mirror Lake (Z-3) was last stocked on Oct. 6, 2026 with 735 tiger trout (11.1 in. average), according to the Utah DWR fish stocking report. It is a lake in Duchesne County, Utah. From 2021 to 2026, DWR stocked 92,450 fish here, the 4th most of 263 stocked waters in Duchesne County.
Recent stockings at Mirror Lake (Z-3)
- Oct. 6, 2026735 tiger trout, 11.1 in. average
- Aug. 31, 2026750 rainbow trout, 11.2 in. average
- Aug. 24, 2026750 rainbow trout, 11.2 in. average
- Aug. 12, 2026750 rainbow trout, 10.8 in. average
- Aug. 3, 2026752 rainbow trout, 10.5 in. average
- July 27, 2026750 rainbow trout, 10.8 in. average
Newest first, from the Utah DWR stocking report. Full stocking history.
Mirror Lake (Z-3) facts
- Last stocked
- Oct. 6, 2026 (35 days ago): 735 tiger trout
- Stockings in 2026
- 16 (14,639 fish): 9,165 rainbow trout, 3,485 brook trout and 1,989 tiger trout
- County
- Duchesne County
- Stocked since 2021
- rainbow trout, tiger trout and brook trout
- Average size stocked
- 8.8 in. (2021 to 2026)
- County rank
- 4th most fish of 263 stocked waters in Duchesne County since 2021
- Name in DWR report
- MIRROR L Z-3
- Nearest water
- Emerald Lake (D-20), 0.4 mi
- Rules
- Statewide rules (no water-specific entry in the 2026 guidebook)
Mirror Lake (Z-3) stocking report, last 12 months
| Oct. 6, 2026 | Tiger trout | 735 | 11.1 in. |
| Aug. 31, 2026 | Rainbow trout | 750 | 11.2 in. |
| Aug. 24, 2026 | Rainbow trout | 750 | 11.2 in. |
| Aug. 12, 2026 | Rainbow trout | 750 | 10.8 in. |
| Aug. 3, 2026 | Rainbow trout | 752 | 10.5 in. |
| July 27, 2026 | Rainbow trout | 750 | 10.8 in. |
| July 21, 2026 | Tiger trout | 624 | 10.6 in. |
| July 20, 2026 | Rainbow trout | 822 | 10.8 in. |
| July 15, 2026 | Rainbow trout | 750 | 10.8 in. |
| July 9, 2026 | Tiger trout | 630 | 10.1 in. |
| July 8, 2026 | Rainbow trout | 750 | 11.0 in. |
| June 29, 2026 | Rainbow trout | 750 | 10.5 in. |
| June 23, 2026 | Rainbow trout | 1,503 | 9.8 in. |
| June 20, 2026 | Brook trout | 3,485 | 3.5 in. |
| June 8, 2026 | Rainbow trout | 430 | 10.1 in. |
| June 8, 2026 | Rainbow trout | 408 | 10.1 in. |
Source: Utah DWR fish stocking report. Stocking data fetched Nov. 10, 2026; newest record dated Nov. 19, 2026. DWR posts stockings after they happen and does not publish schedules.
Mirror Lake (Z-3) stocking profile
- First record in the DWR report: June 3, 2002. Since then DWR has logged 464 stockings here in 25 different years, 541,418 fish in all.
- Species stocked 2021 to 2026, by share of fish: rainbow trout 56% (51,466 fish), brook trout 23% (21,447 fish) and tiger trout 21% (19,537 fish).
- Busiest months in the record: July (38% of records) and August (33% of records).
- Stocked fish averaged 8.8 in. from 2021 to 2026 (per-record averages ranged from 2.7 to 12.9 in.). The yearly average was 8.1 in. in 2021 and 9.5 in. in 2025.
- Fish stocked 2021 to 2026: 92,450, the 4th most of 263 stocked waters in Duchesne County and 71st of 1,076 statewide.
- Nearest other water with a page: Emerald Lake (D-20), 0.4 mi away.
Computed from Utah DWR stocking records (fish counts and average lengths as DWR reports them). Past stocking is history, not a schedule.
When is Mirror Lake (Z-3) stocked?
Based on DWR stocking records, 2021 to 2025. Stocked in 5 of those 5 years.
2025 stocking: 16 records, first on June 17, last on Sept. 2.
DWR does not publish stocking schedules. This is past stocking, not a promise. How we read patterns.
Mirror Lake (Z-3) stocking history by year
| Year | Records | Fish | Avg. length | Species |
|---|---|---|---|---|
| 2026 | 16 | 14,639 | 8.9 in. | Tiger trout, Rainbow trout, Brook trout |
| 2025 | 16 | 14,502 | 9.5 in. | Rainbow trout, Tiger trout, Brook trout |
| 2024 | 17 | 16,189 | 9.0 in. | Tiger trout, Rainbow trout, Brook trout |
| 2023 | 14 | 14,764 | 8.8 in. | Tiger trout, Rainbow trout, Brook trout |
| 2022 | 17 | 17,653 | 8.4 in. | Rainbow trout, Tiger trout, Brook trout |
| 2021 | 15 | 14,703 | 8.1 in. | Rainbow trout, Tiger trout, Brook trout |
| 2020 | 19 | 23,006 | 7.8 in. | Tiger trout, Rainbow trout, Brook trout |
| 2019 | 17 | 16,815 | 9.0 in. | Rainbow trout, Tiger trout, Brook trout |
| 2018 | 18 | 20,375 | 8.7 in. | Rainbow trout, Tiger trout, Brook trout |
| 2017 | 18 | 17,304 | 8.9 in. | Rainbow trout, Tiger trout, Brook trout |
| 2016 | 24 | 18,870 | 8.9 in. | Rainbow trout, Tiger trout, Brook trout |
| 2015 | 21 | 23,022 | 7.5 in. | Arctic grayling, Tiger trout, Rainbow trout |
| 2014 | 19 | 20,752 | 9.0 in. | Rainbow trout, Tiger trout, Brook trout |
| 2013 | 8 | 11,286 | 7.1 in. | Rainbow trout, Brook trout |
| 2012 | 23 | 23,592 | 6.9 in. | Tiger trout, Rainbow trout, Brook trout |
| 2011 | 10 | 14,646 | 9.6 in. | Rainbow trout, Tiger trout |
| 2010 | 20 | 24,541 | 8.0 in. | Tiger trout, Rainbow trout, Brook trout |
| 2009 | 22 | 30,093 | 7.8 in. | Rainbow trout, Brook trout |
| 2008 | 19 | 26,038 | 8.3 in. | Rainbow trout, Brook trout |
| 2007 | 22 | 30,350 | 7.5 in. | Rainbow trout, Brook trout |
| 2006 | 18 | 24,042 | 8.2 in. | Rainbow trout, Brook trout |
| 2005 | 18 | 23,122 | 8.0 in. | Rainbow trout, Brook trout |
| 2004 | 24 | 31,122 | 7.5 in. | Rainbow trout, Brook trout |
| 2003 | 26 | 40,146 | 6.4 in. | Rainbow trout, Brook trout |
| 2002 | 23 | 29,846 | 6.9 in. | Rainbow trout, Brook trout |
All stocking records 2021 to Nov. 10, 2025 (79)
| Sept. 2, 2025 | Rainbow trout | 900 | 12.8 in. |
| Aug. 20, 2025 | Tiger trout | 627 | 11.5 in. |
| Aug. 18, 2025 | Rainbow trout | 949 | 12.9 in. |
| Aug. 5, 2025 | Rainbow trout | 391 | 12.9 in. |
| Aug. 5, 2025 | Rainbow trout | 535 | 12.9 in. |
| July 28, 2025 | Rainbow trout | 650 | 12.4 in. |
| July 28, 2025 | Rainbow trout | 247 | 12.4 in. |
| July 21, 2025 | Rainbow trout | 900 | 10.8 in. |
| July 14, 2025 | Rainbow trout | 1,023 | 10.4 in. |
| July 14, 2025 | Rainbow trout | 772 | 10.4 in. |
| July 10, 2025 | Tiger trout | 626 | 11.1 in. |
| July 9, 2025 | Brook trout | 3,551 | 3.5 in. |
| July 7, 2025 | Rainbow trout | 900 | 10.8 in. |
| June 23, 2025 | Rainbow trout | 902 | 10.4 in. |
| June 23, 2025 | Tiger trout | 630 | 11.1 in. |
| June 17, 2025 | Rainbow trout | 899 | 10.6 in. |
| Oct. 21, 2024 | Tiger trout | 364 | 12.1 in. |
| Aug. 28, 2024 | Rainbow trout | 757 | 11.0 in. |
| Aug. 19, 2024 | Tiger trout | 511 | 10.6 in. |
| Aug. 12, 2024 | Rainbow trout | 1,035 | 10.3 in. |
| Aug. 5, 2024 | Rainbow trout | 460 | 10.3 in. |
| July 31, 2024 | Tiger trout | 509 | 10.6 in. |
| July 29, 2024 | Rainbow trout | 759 | 10.3 in. |
| July 22, 2024 | Rainbow trout | 759 | 10.3 in. |
| July 16, 2024 | Brook trout | 3,501 | 3.8 in. |
| July 15, 2024 | Rainbow trout | 875 | 10.0 in. |
| July 8, 2024 | Rainbow trout | 800 | 10.0 in. |
| July 8, 2024 | Tiger trout | 1,500 | 10.0 in. |
| July 2, 2024 | Rainbow trout | 800 | 10.0 in. |
| June 26, 2024 | Tiger trout | 1,000 | 10.0 in. |
| June 25, 2024 | Rainbow trout | 810 | 11.2 in. |
| June 20, 2024 | Tiger trout | 1,001 | 9.9 in. |
| June 19, 2024 | Rainbow trout | 748 | 12.3 in. |
| Sept. 13, 2023 | Tiger trout | 814 | 10.4 in. |
| Aug. 28, 2023 | Rainbow trout | 721 | 12.1 in. |
| Aug. 22, 2023 | Tiger trout | 1,200 | 9.4 in. |
| Aug. 21, 2023 | Rainbow trout | 1,001 | 12.1 in. |
| Aug. 14, 2023 | Rainbow trout | 751 | 11.7 in. |
| Aug. 7, 2023 | Rainbow trout | 778 | 12.1 in. |
| Aug. 2, 2023 | Rainbow trout | 801 | 12.1 in. |
| Aug. 1, 2023 | Rainbow trout | 899 | 9.5 in. |
| July 25, 2023 | Rainbow trout | 754 | 12.0 in. |
| July 18, 2023 | Rainbow trout | 753 | 11.3 in. |
| July 18, 2023 | Tiger trout | 896 | 9.2 in. |
| July 17, 2023 | Brook trout | 3,900 | 2.7 in. |
| July 10, 2023 | Rainbow trout | 743 | 11.2 in. |
| July 3, 2023 | Rainbow trout | 753 | 11.3 in. |
| Aug. 29, 2022 | Rainbow trout | 1,000 | 10.3 in. |
| Aug. 23, 2022 | Rainbow trout | 451 | 10.3 in. |
| Aug. 16, 2022 | Tiger trout | 1,002 | 9.6 in. |
| Aug. 15, 2022 | Rainbow trout | 750 | 10.0 in. |
| Aug. 8, 2022 | Rainbow trout | 750 | 10.0 in. |
| Aug. 2, 2022 | Tiger trout | 1,062 | 9.4 in. |
| Aug. 1, 2022 | Rainbow trout | 800 | 10.0 in. |
| July 26, 2022 | Rainbow trout | 750 | 10.0 in. |
| July 21, 2022 | Rainbow trout | 1,800 | 10.0 in. |
| July 19, 2022 | Rainbow trout | 750 | 10.1 in. |
| July 11, 2022 | Rainbow trout | 752 | 10.1 in. |
| July 5, 2022 | Rainbow trout | 760 | 10.1 in. |
| July 4, 2022 | Brook trout | 3,500 | 2.9 in. |
| June 27, 2022 | Tiger trout | 1,000 | 9.4 in. |
| June 27, 2022 | Rainbow trout | 752 | 9.2 in. |
| June 17, 2022 | Tiger trout | 1,024 | 9.2 in. |
| June 14, 2022 | Rainbow trout | 750 | 9.4 in. |
| Aug. 23, 2021 | Rainbow trout | 697 | 12.1 in. |
| Aug. 17, 2021 | Rainbow trout | 518 | 12.1 in. |
| Aug. 16, 2021 | Tiger trout | 752 | 9.2 in. |
| Aug. 9, 2021 | Rainbow trout | 749 | 10.1 in. |
| Aug. 2, 2021 | Tiger trout | 1,008 | 9.3 in. |
| Aug. 2, 2021 | Rainbow trout | 751 | 10.1 in. |
| July 27, 2021 | Rainbow trout | 751 | 10.1 in. |
| July 19, 2021 | Rainbow trout | 766 | 9.3 in. |
| July 12, 2021 | Rainbow trout | 751 | 9.3 in. |
| June 28, 2021 | Brook trout | 3,510 | 2.7 in. |
| June 28, 2021 | Rainbow trout | 751 | 9.3 in. |
| June 28, 2021 | Tiger trout | 1,002 | 9.4 in. |
| June 21, 2021 | Rainbow trout | 766 | 9.3 in. |
| June 9, 2021 | Tiger trout | 1,020 | 9.4 in. |
| June 9, 2021 | Rainbow trout | 911 | 9.3 in. |
Fishing rules
No water-specific entry for Mirror Lake (Z-3) in the 2026 guidebook: statewide limits apply unless a group entry (such as a drainage) covers it.
From the 2026 Utah Fishing Guidebook, in our own words. Rules can change mid-year: check wildlife.utah.gov/guidebooks before fishing.
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Mirror Lake (Z-3) questions
When is Mirror Lake (Z-3) stocked?
DWR does not publish stocking schedules. Past records show Mirror Lake (Z-3) was stocked in mid to late June (4 of the last 5 years), early to mid July (5 of the last 5 years), late July to early August (5 of the last 5 years) and mid to late August (5 of the last 5 years). The most recent stocking in the DWR report is dated Oct. 6, 2026.
What fish are in Mirror Lake (Z-3)?
Since 2021 DWR has stocked rainbow trout, tiger trout and brook trout.
Stocking: Utah DWR fish stocking report, fetched Nov. 10, 2026. Location: Utah DWR, USGS NHD. Rules: 2026 Utah Fishing Guidebook. Page built Nov. 10, 2026. Found an error? Tell us. Verify rules with DWR before fishing.