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.
Recent stockings at Miller Flat Reservoir
- July 20, 2026516 brook trout, 3.1 in. average
- June 29, 20266,399 brook trout, 3.6 in. average
- June 23, 202620,085 rainbow trout, 2.9 in. average
- July 15, 2025500 brook trout, 3.5 in. average
- June 11, 202519,980 rainbow trout, 4.4 in. average
- Aug. 6, 2024500 brook trout, 3.3 in. average
Newest first, from the Utah DWR stocking report. Full stocking history.
Miller Flat Reservoir facts
- Last stocked
- July 20, 2026 (113 days ago): 516 brook trout
- Stockings in 2026
- 3 (27,000 fish): 20,085 rainbow trout and 6,915 brook trout
- County
- Sanpete County
- Size
- 160 acres
- Stocked since 2021
- rainbow trout and brook trout
- Likely catch (DWR)
- rainbow trout
- Average size stocked
- 3.6 in. (2021 to 2026)
- County rank
- Most fish of 71 stocked waters in Sanpete County since 2021
- Name in DWR report
- MILLERS FLAT RES
- Nearest water
- Huntington Creek, Left Fork, 1.7 mi
- Rules
- Statewide rules (no water-specific entry in the 2026 guidebook)
Latest fishing report
Fall outlook: cooling water should clear out the summer algae, and trout then feed actively to bulk up ahead of winter. DWR expects fair to good rainbow trout fishing with natural baits, lures and flies.
This report is more than 60 days old. Conditions have likely changed.
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 Nov. 10, 2026; newest record dated Nov. 19, 2026. DWR posts stockings after they happen and does not publish schedules.
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 1,076 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.
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. This is past stocking, not a promise. How we read patterns.
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 Nov. 10, 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
No water-specific entry for Miller Flat Reservoir 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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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.
Stocking: Utah DWR fish stocking report, fetched Nov. 10, 2026. Size, program, species and facilities: DWR Fish Utah. 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.