Koosharem Reservoir fishing
Koosharem Reservoir was last stocked on March 3, 2026 with 6,002 rainbow trout (9.3 in. average), according to the Utah DWR fish stocking report. It is a reservoir in Sevier County, Utah. From 2021 to 2026, DWR stocked 100,017 fish here, the 3rd most of 39 stocked waters in Sevier County.
Koosharem Reservoir stocking report, last 12 months
| March 3, 2026 | Rainbow trout | 3,001 | 9.3 in. |
| March 3, 2026 | Rainbow trout | 3,001 | 9.3 in. |
| Nov. 5, 2025 | Rainbow trout | 1,947 | 10.4 in. |
| Oct. 21, 2025 | Rainbow trout | 3,009 | 7.8 in. |
| Oct. 20, 2025 | Brook trout | 835 | 13.3 in. |
| Oct. 20, 2025 | Rainbow trout | 6,000 | 4.9 in. |
| Oct. 20, 2025 | Tiger trout | 1,980 | 5.5 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 Koosharem Reservoir stocked?
Based on DWR stocking records, 2021 to 2025. Stocked in 5 of those 5 years.
2025 stocking: 10 records, first on March 27, last on Nov. 5.
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.
Koosharem Reservoir stocking profile
- First record in the DWR report: Oct. 28, 2002. Since then DWR has logged 164 stockings here in 25 different years, 695,471 fish in all.
- Species stocked 2021 to 2026, by share of fish: rainbow trout 48% (48,352 fish), cutthroat trout 27% (26,975 fish), brook trout 9% (8,890 fish), tiger trout 9% (8,791 fish), splake 6% (6,009 fish) and tiger muskie 1% (1,000 fish).
- Busiest months in the record: April (35% of records) and March (16% of records).
- Stocked fish averaged 7.7 in. from 2021 to 2026 (per-record averages ranged from 1.1 to 15.4 in.). The yearly average was 8.9 in. in 2021 and 7.5 in. in 2025.
- Fish stocked 2021 to 2026: 100,017, the 3rd most of 39 stocked waters in Sevier County and 62nd of 1,068 statewide.
- Nearest other water with a page: Big Lake (Sevier County), 7.3 mi away.
Computed from Utah DWR stocking records (fish counts and average lengths as DWR reports them). Past stocking is history, not a schedule.
Koosharem Reservoir stocking history by year
| Year | Records | Fish | Avg. length | Species |
|---|---|---|---|---|
| 2026 | 2 | 6,002 | 9.3 in. | Rainbow trout |
| 2025 | 10 | 26,856 | 7.5 in. | Rainbow trout, Brook trout, Tiger trout, Splake, Cutthroat trout |
| 2024 | 7 | 18,368 | 7.0 in. | Tiger trout, Splake, Rainbow trout, Cutthroat trout |
| 2023 | 9 | 24,144 | 6.6 in. | Tiger trout, Brook trout, Splake, Rainbow trout, Cutthroat trout |
| 2022 | 5 | 11,100 | 9.1 in. | Rainbow trout, Cutthroat trout |
| 2021 | 10 | 13,547 | 8.9 in. | Rainbow trout, Tiger muskie, Cutthroat trout |
| 2020 | 11 | 39,461 | 6.0 in. | Tiger trout, Splake, Tiger muskie, Rainbow trout, Cutthroat trout |
| 2019 | 7 | 66,642 | 4.6 in. | Tiger trout, Cutthroat trout, Rainbow trout |
| 2018 | 7 | 40,079 | 4.5 in. | Splake, Tiger trout, Rainbow trout, Cutthroat trout |
| 2017 | 8 | 36,141 | 6.0 in. | Cutthroat trout, Splake, Tiger trout, Brook trout, Rainbow trout |
| 2016 | 6 | 18,638 | 7.8 in. | Tiger trout, Splake, Rainbow trout, Cutthroat trout |
| 2015 | 6 | 28,451 | 5.9 in. | Tiger trout, Splake, Cutthroat trout, Rainbow trout |
| 2014 | 4 | 9,011 | 6.4 in. | Tiger trout, Splake, Rainbow trout |
| 2013 | 5 | 16,212 | 8.0 in. | Splake, Cutthroat trout, Rainbow trout |
| 2012 | 9 | 23,815 | 8.2 in. | Tiger trout, Rainbow trout, Cutthroat trout |
| 2011 | 4 | 14,003 | 8.3 in. | Rainbow trout, Cutthroat trout |
| 2010 | 4 | 22,740 | 5.4 in. | Cutthroat trout, Tiger trout, Rainbow trout |
| 2009 | 3 | 12,016 | 4.9 in. | Tiger trout, Rainbow trout |
| 2008 | 4 | 29,805 | 5.0 in. | Cutthroat trout, Tiger trout, Rainbow trout |
| 2007 | 4 | 30,635 | 5.0 in. | Cutthroat trout, Tiger trout, Rainbow trout |
| 2006 | 8 | 42,042 | 5.6 in. | Cutthroat trout, Tiger trout, Rainbow trout |
| 2005 | 7 | 29,012 | 6.1 in. | Tiger trout, Rainbow trout, Cutthroat trout |
| 2004 | 10 | 55,059 | 5.1 in. | Cutthroat trout, Tiger trout, Rainbow trout |
| 2003 | 9 | 42,993 | 5.5 in. | Rainbow trout, Cutthroat trout |
| 2002 | 5 | 38,699 | 5.1 in. | Rainbow trout, Cutthroat trout |
All stocking records 2021 to Sept. 24, 2025 (36)
| June 9, 2025 | Splake | 2,002 | 3.5 in. |
| April 9, 2025 | Rainbow trout | 1,515 | 9.6 in. |
| April 2, 2025 | Rainbow trout | 2,240 | 9.6 in. |
| April 2, 2025 | Rainbow trout | 2,240 | 9.6 in. |
| March 27, 2025 | Cutthroat trout | 5,088 | 8.1 in. |
| Oct. 28, 2024 | Tiger trout | 2,050 | 5.6 in. |
| July 11, 2024 | Tiger trout | 2,760 | 3.3 in. |
| July 8, 2024 | Splake | 2,000 | 2.7 in. |
| May 15, 2024 | Rainbow trout | 1,679 | 9.6 in. |
| May 7, 2024 | Rainbow trout | 2,162 | 9.6 in. |
| May 7, 2024 | Rainbow trout | 2,162 | 9.6 in. |
| March 18, 2024 | Cutthroat trout | 5,555 | 8.2 in. |
| Oct. 16, 2023 | Tiger trout | 2,001 | 5.9 in. |
| Aug. 17, 2023 | Brook trout | 5,384 | 3.3 in. |
| Aug. 17, 2023 | Brook trout | 2,671 | 3.1 in. |
| July 5, 2023 | Splake | 2,007 | 3.6 in. |
| May 10, 2023 | Rainbow trout | 2,003 | 9.5 in. |
| May 3, 2023 | Rainbow trout | 2,198 | 9.5 in. |
| April 26, 2023 | Rainbow trout | 1,800 | 9.4 in. |
| April 13, 2023 | Cutthroat trout | 1,900 | 9.4 in. |
| April 13, 2023 | Cutthroat trout | 4,180 | 9.4 in. |
| April 5, 2022 | Rainbow trout | 1,050 | 10.0 in. |
| April 5, 2022 | Rainbow trout | 1,050 | 10.0 in. |
| April 1, 2022 | Rainbow trout | 1,950 | 9.9 in. |
| April 1, 2022 | Rainbow trout | 1,950 | 9.9 in. |
| March 28, 2022 | Cutthroat trout | 5,100 | 8.2 in. |
| May 4, 2021 | Rainbow trout | 724 | 9.4 in. |
| May 4, 2021 | Rainbow trout | 724 | 9.4 in. |
| May 4, 2021 | Rainbow trout | 724 | 9.4 in. |
| May 4, 2021 | Rainbow trout | 724 | 9.4 in. |
| May 4, 2021 | Rainbow trout | 724 | 9.4 in. |
| April 20, 2021 | Rainbow trout | 2,376 | 9.4 in. |
| April 20, 2021 | Tiger muskie | 1,000 | 1.1 in. |
| March 29, 2021 | Cutthroat trout | 5,152 | 8.1 in. |
| March 25, 2021 | Rainbow trout | 695 | 15.4 in. |
| March 25, 2021 | Rainbow trout | 704 | 15.4 in. |
Fishing rules
The 2026 Utah Fishing Guidebook lists no water-specific rules for Koosharem 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.
Access and facilities
- Boating
- Hand launch
- Camping
- Primitive tent camping
- Facilities
- Restrooms
- Other activities
- Wildlife watching
Facility list from DWR Fish Utah. Check with the land manager before you go; facilities close seasonally.
Email me when Koosharem 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.
Koosharem Reservoir questions
When is Koosharem Reservoir stocked?
DWR does not publish stocking schedules. Past records show Koosharem Reservoir was stocked in late March (3 of the last 5 years), early to mid April (4 of the last 5 years), early May (3 of the last 5 years) and mid to late October (3 of the last 5 years). The most recent stocking in the DWR report is dated March 3, 2026.
What fish are in Koosharem Reservoir?
DWR lists cutthroat trout and rainbow trout as likely catches and brook trout, splake and tiger trout as possible. Since 2021 DWR has stocked rainbow trout, cutthroat trout, tiger trout, brook trout, splake and tiger muskie.
What are the fishing limits at Koosharem 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.