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.
Recent stockings at Blanding Reservoir No. 4
- Aug. 31, 20262,005 rainbow trout, 10.9 in. average
- July 27, 20264,506 tiger trout, 3.0 in. average
- May 27, 20261,456 rainbow trout, 10.1 in. average
- May 18, 20261,820 rainbow trout, 10.1 in. average
- April 7, 20261,680 rainbow trout, 10.9 in. average
- Oct. 15, 20251,540 rainbow trout, 10.2 in. average
Newest first, from the Utah DWR stocking report. Full stocking history.
Blanding Reservoir No. 4 facts
- Last stocked
- Aug. 31, 2026 (71 days ago): 2,005 rainbow trout
- Stockings in 2026
- 5 (11,467 fish): 6,961 rainbow trout and 4,506 tiger trout
- County
- San Juan County
- Stocked since 2021
- rainbow trout and tiger trout
- Likely catch (DWR)
- rainbow trout and tiger trout
- Average size stocked
- 7.1 in. (2021 to 2026)
- County rank
- 2nd most fish of 16 stocked waters in San Juan County since 2021
- Name in DWR report
- BLANDING RES NO 4
- Nearest water
- Blanding Reservoir No. 3, 0.6 mi
- Rules
- Statewide rules (no water-specific entry in the 2026 guidebook)
Latest fishing report
Fall outlook: rainbow trout are plentiful, and DWR expects good to excellent fishing, particularly as the water cools. Popular flies, lures and baits should all catch fish. In fall, tiger trout turn aggressive ahead of winter and can be caught on streamers and mouse-pattern flies, spinners and Rapalas, or marabou and tube jigs.
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.
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. |
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.
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 89th of 1,076 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.
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. This is past stocking, not a promise. How we read patterns.
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 Nov. 10, 2025 (22)
| Oct. 15, 2025 | Rainbow trout | 1,540 | 10.2 in. |
| 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
No water-specific entry for Blanding Reservoir No. 4 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.
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.
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"Often stocked around now" heads-ups come from past records only, never a promise. We use your email only for these alerts. 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.
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.