Miller Flat Reservoir fishing
Miller Flat Reservoir was last stocked on July 20, 2026 with 516 brook trout (3.1 in. average), according to the Utah DWR fish stocking report. It is a 160-acre reservoir in Sanpete County, Utah. From 2021 to 2026, DWR stocked 130,216 fish here, the most of 71 stocked waters in Sanpete County.
Latest fishing report
Fall outlook: cooling water should clear out the summer algae, and trout then feed hard ahead of winter. Expect fair to good rainbow trout fishing on natural baits, lures and flies.
Our summary of the Utah DWR fishing report dated Sept. 4, 2026, in our own words. Read the original on DWR Fish Utah.
Miller Flat Reservoir stocking report, last 12 months
| July 20, 2026 | Brook trout | 516 | 3.1 in. |
| June 29, 2026 | Brook trout | 6,399 | 3.6 in. |
| June 23, 2026 | Rainbow trout | 20,085 | 2.9 in. |
Source: Utah DWR fish stocking report. Stocking data fetched Sept. 25, 2026; newest record dated Sept. 23, 2026. DWR posts stockings after they happen and does not publish schedules.
When is Miller Flat Reservoir stocked?
Based on DWR stocking records, 2021 to 2025. Stocked in 5 of those 5 years.
2025 stocking: 3 records, first on June 11, last on July 15.
DWR does not publish stocking schedules. Patterns are based on past stocking records and are not a promise of future stocking. Weather, water conditions and hatchery supply change plans. How we read patterns.
Miller Flat Reservoir stocking profile
- First record in the DWR report: May 29, 2002. Since then DWR has logged 64 stockings here in 25 different years, 519,883 fish in all.
- Species stocked 2021 to 2026, by share of fish: rainbow trout 93% (120,770 fish) and brook trout 7% (9,446 fish).
- Busiest months in the record: June (50% of records) and July (41% of records).
- Stocked fish averaged 3.6 in. from 2021 to 2026 (per-record averages ranged from 2.7 to 5.6 in.). The yearly average was 2.7 in. in 2021 and 4.3 in. in 2025.
- Fish stocked 2021 to 2026: 130,216, the most of 71 stocked waters in Sanpete County and 48th of 1,068 statewide.
- Nearest other water with a page: Huntington Creek, Left Fork, 1.7 mi away.
Computed from Utah DWR stocking records (fish counts and average lengths as DWR reports them). Past stocking is history, not a schedule.
Miller Flat Reservoir stocking history by year
| Year | Records | Fish | Avg. length | Species |
|---|---|---|---|---|
| 2026 | 3 | 27,000 | 3.1 in. | Brook trout, Rainbow trout |
| 2025 | 3 | 20,480 | 4.3 in. | Brook trout, Rainbow trout |
| 2024 | 2 | 20,875 | 3.1 in. | Brook trout, Rainbow trout |
| 2023 | 4 | 20,833 | 5.3 in. | Brook trout, Rainbow trout |
| 2022 | 2 | 40,508 | 3.1 in. | Rainbow trout, Brook trout |
| 2021 | 1 | 520 | 2.7 in. | Brook trout |
| 2020 | 3 | 29,839 | 3.1 in. | Brook trout, Rainbow trout |
| 2019 | 1 | 24,690 | 3.0 in. | Rainbow trout |
| 2018 | 2 | 20,670 | 3.4 in. | Brook trout, Rainbow trout |
| 2017 | 1 | 21,248 | 4.8 in. | Rainbow trout |
| 2016 | 2 | 20,736 | 5.4 in. | Rainbow trout |
| 2015 | 1 | 19,998 | 3.4 in. | Rainbow trout |
| 2014 | 2 | 22,164 | 4.4 in. | Rainbow trout |
| 2013 | 2 | 21,237 | 4.6 in. | Rainbow trout |
| 2012 | 2 | 23,467 | 4.1 in. | Rainbow trout |
| 2011 | 3 | 23,245 | 4.0 in. | Rainbow trout |
| 2010 | 2 | 21,986 | 4.1 in. | Rainbow trout |
| 2009 | 3 | 22,542 | 4.0 in. | Rainbow trout |
| 2008 | 4 | 23,939 | 4.1 in. | Rainbow trout |
| 2007 | 2 | 22,012 | 4.0 in. | Rainbow trout |
| 2006 | 4 | 21,955 | 5.9 in. | Rainbow trout |
| 2005 | 5 | 21,959 | 4.9 in. | Rainbow trout |
| 2004 | 6 | 22,977 | 4.3 in. | Rainbow trout |
| 2003 | 2 | 2,001 | 9.3 in. | Rainbow trout |
| 2002 | 2 | 3,002 | 10.0 in. | Rainbow trout |
All stocking records 2021 to Sept. 24, 2025 (12)
| July 15, 2025 | Brook trout | 500 | 3.5 in. |
| June 11, 2025 | Rainbow trout | 9,990 | 4.4 in. |
| June 11, 2025 | Rainbow trout | 9,990 | 4.4 in. |
| Aug. 6, 2024 | Brook trout | 500 | 3.3 in. |
| July 11, 2024 | Rainbow trout | 20,375 | 3.1 in. |
| July 26, 2023 | Brook trout | 503 | 3.0 in. |
| June 28, 2023 | Rainbow trout | 14,100 | 5.6 in. |
| June 28, 2023 | Rainbow trout | 4,230 | 5.6 in. |
| June 28, 2023 | Rainbow trout | 2,000 | 2.9 in. |
| July 11, 2022 | Rainbow trout | 40,000 | 3.1 in. |
| June 29, 2022 | Brook trout | 508 | 3.0 in. |
| June 30, 2021 | Brook trout | 520 | 2.7 in. |
Fishing rules
The 2026 Utah Fishing Guidebook lists no water-specific rules for Miller Flat Reservoir under that name, so statewide rules apply unless DWR posts a change. Some waters are covered by a group entry (for example a drainage or its tributaries).
Rules summarized in our own words from the 2026 Utah Fishing Guidebook. DWR can change rules mid-year: check the current guidebook and its updates at wildlife.utah.gov/guidebooks before fishing. See statewide limits.
Email me when Miller Flat Reservoir is stocked
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"Was stocked" alerts come from new rows in the DWR stocking report. "Often stocked around now" heads-ups come from past stocking records only. DWR does not publish stocking schedules, so a heads-up is never a promise. We store your email only for these alerts; ask us to delete it at [email protected]. Privacy.
Miller Flat Reservoir questions
When is Miller Flat Reservoir stocked?
DWR does not publish stocking schedules. Past records show Miller Flat Reservoir was stocked in late June (3 of the last 5 years) and mid July (3 of the last 5 years). The most recent stocking in the DWR report is dated July 20, 2026.
What fish are in Miller Flat Reservoir?
DWR lists rainbow trout as likely catches and brook trout and cutthroat trout as possible. Since 2021 DWR has stocked rainbow trout and brook trout.
What are the fishing limits at Miller Flat Reservoir?
The 2026 guidebook lists no water-specific rules under this name, so statewide limits apply unless DWR posts a change. See our statewide limits page and check the guidebook.
Stocking: Utah DWR fish stocking report, fetched Sept. 25, 2026. Size, program, species and facilities: DWR Fish Utah. Location: Utah DWR, USGS NHD. Rules: 2026 Utah Fishing Guidebook. Page built Sept. 24, 2026. Found an error? [email protected]. Verify rules with DWR before fishing.