Blanding Reservoir No. 4 fishing
Blanding Reservoir No. 4 was last stocked on Aug. 31, 2026 with 2,005 rainbow trout (10.9 in. average), according to the Utah DWR fish stocking report. It is a reservoir in San Juan County, Utah. From 2021 to 2026, DWR stocked 65,102 fish here, the 2nd most of 16 stocked waters in San Juan County.
Latest fishing report
Fall outlook: rainbows are plentiful, with good to excellent fishing as it cools on standard baits, lures and flies. Tiger trout feed aggressively before winter and take streamers, mouse flies, spinners, Rapalas, marabou jigs and tubes.
Our summary of the Utah DWR fishing report dated Sept. 4, 2026, in our own words. Read the original on DWR Fish Utah.
Blanding Reservoir No. 4 stocking report, last 12 months
| Aug. 31, 2026 | Rainbow trout | 2,005 | 10.9 in. |
| July 27, 2026 | Tiger trout | 4,506 | 3.0 in. |
| May 27, 2026 | Rainbow trout | 1,456 | 10.1 in. |
| May 18, 2026 | Rainbow trout | 1,820 | 10.1 in. |
| April 7, 2026 | Rainbow trout | 1,680 | 10.9 in. |
| Oct. 15, 2025 | Rainbow trout | 1,540 | 10.2 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 Blanding Reservoir No. 4 stocked?
Based on DWR stocking records, 2021 to 2025. Stocked in 5 of those 5 years.
2025 stocking: 6 records, first on March 24, last on Oct. 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.
Blanding Reservoir No. 4 stocking profile
- First record in the DWR report: April 2, 2004. Since then DWR has logged 111 stockings here in 23 different years, 245,452 fish in all.
- Species stocked 2021 to 2026, by share of fish: rainbow trout 58% (38,065 fish) and tiger trout 42% (27,037 fish).
- Busiest months in the record: August (22% of records) and April (20% of records).
- Stocked fish averaged 7.1 in. from 2021 to 2026 (per-record averages ranged from 2.5 to 10.9 in.).
- Fish stocked 2021 to 2026: 65,102, the 2nd most of 16 stocked waters in San Juan County and 88th of 1,068 statewide.
- Nearest other water with a page: Blanding Reservoir No. 3, 0.6 mi away.
Computed from Utah DWR stocking records (fish counts and average lengths as DWR reports them). Past stocking is history, not a schedule.
Blanding Reservoir No. 4 stocking history by year
| Year | Records | Fish | Avg. length | Species |
|---|---|---|---|---|
| 2026 | 5 | 11,467 | 7.6 in. | Rainbow trout, Tiger trout |
| 2025 | 6 | 12,834 | 7.5 in. | Rainbow trout, Tiger trout |
| 2024 | 5 | 10,213 | 6.9 in. | Rainbow trout, Tiger trout |
| 2023 | 4 | 10,025 | 6.5 in. | Rainbow trout, Tiger trout |
| 2022 | 3 | 10,033 | 6.6 in. | Rainbow trout, Tiger trout |
| 2021 | 4 | 10,530 | 7.2 in. | Rainbow trout, Tiger trout |
| 2020 | 4 | 10,050 | 6.9 in. | Rainbow trout, Tiger trout |
| 2019 | 6 | 11,802 | 7.0 in. | Rainbow trout, Tiger trout |
| 2018 | 6 | 11,328 | 7.2 in. | Rainbow trout, Tiger trout |
| 2017 | 4 | 10,053 | 6.9 in. | Rainbow trout, Tiger trout |
| 2016 | 4 | 9,998 | 7.3 in. | Rainbow trout, Tiger trout |
| 2015 | 3 | 10,074 | 6.8 in. | Rainbow trout, Tiger trout |
| 2014 | 5 | 10,128 | 7.3 in. | Rainbow trout, Tiger trout |
| 2013 | 5 | 9,998 | 7.0 in. | Rainbow trout, Tiger trout |
| 2012 | 5 | 11,004 | 7.8 in. | Rainbow trout, Tiger trout |
| 2011 | 5 | 13,244 | 8.3 in. | Rainbow trout, Tiger trout |
| 2010 | 6 | 12,225 | 8.2 in. | Rainbow trout, Tiger trout |
| 2009 | 5 | 12,221 | 7.7 in. | Rainbow trout, Tiger trout |
| 2008 | 6 | 11,669 | 7.9 in. | Rainbow trout, Tiger trout |
| 2007 | 6 | 11,381 | 8.3 in. | Rainbow trout, Tiger trout |
| 2006 | 6 | 10,880 | 7.7 in. | Rainbow trout, Tiger trout |
| 2005 | 7 | 12,795 | 8.2 in. | Rainbow trout, Tiger trout |
| 2004 | 1 | 1,500 | 9.4 in. | Rainbow trout |
All stocking records 2021 to Sept. 24, 2025 (21)
| Aug. 27, 2025 | Rainbow trout | 2,009 | 9.3 in. |
| July 17, 2025 | Tiger trout | 4,524 | 3.0 in. |
| May 19, 2025 | Rainbow trout | 1,260 | 10.2 in. |
| April 14, 2025 | Rainbow trout | 1,742 | 9.8 in. |
| March 24, 2025 | Rainbow trout | 1,759 | 10.3 in. |
| Oct. 21, 2024 | Rainbow trout | 600 | 10.7 in. |
| Sept. 4, 2024 | Rainbow trout | 1,610 | 10.2 in. |
| July 3, 2024 | Tiger trout | 4,505 | 2.8 in. |
| April 15, 2024 | Rainbow trout | 1,483 | 10.2 in. |
| March 18, 2024 | Rainbow trout | 2,015 | 9.8 in. |
| Aug. 28, 2023 | Rainbow trout | 1,998 | 9.8 in. |
| June 27, 2023 | Tiger trout | 4,499 | 2.5 in. |
| April 24, 2023 | Rainbow trout | 1,752 | 9.9 in. |
| April 17, 2023 | Rainbow trout | 1,776 | 9.9 in. |
| Aug. 30, 2022 | Rainbow trout | 2,004 | 9.4 in. |
| July 12, 2022 | Tiger trout | 4,501 | 2.8 in. |
| March 14, 2022 | Rainbow trout | 3,528 | 9.9 in. |
| Aug. 24, 2021 | Rainbow trout | 2,526 | 10.7 in. |
| June 30, 2021 | Tiger trout | 4,502 | 2.9 in. |
| April 26, 2021 | Rainbow trout | 1,502 | 10.5 in. |
| March 24, 2021 | Rainbow trout | 2,000 | 9.9 in. |
Fishing rules
The 2026 Utah Fishing Guidebook lists no water-specific rules for Blanding Reservoir No. 4 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
- Boat ramp
- Accessible
- Restrooms
- Facilities
- Trails/shoreline paths
Facility list from DWR Fish Utah. Check with the land manager before you go; facilities close seasonally.
Email me when Blanding Reservoir No. 4 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.
Blanding Reservoir No. 4 questions
When is Blanding Reservoir No. 4 stocked?
DWR does not publish stocking schedules. Past records show Blanding Reservoir No. 4 was stocked in mid to late March (4 of the last 5 years), mid April (3 of the last 5 years), late June to early July (3 of the last 5 years) and late August (4 of the last 5 years). The most recent stocking in the DWR report is dated Aug. 31, 2026.
What fish are in Blanding Reservoir No. 4?
DWR lists rainbow trout and tiger trout as likely catches and largemouth bass as possible. Since 2021 DWR has stocked rainbow trout and tiger trout.
What are the fishing limits at Blanding Reservoir No. 4?
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.