Newcastle Reservoir fishing

Newcastle Reservoir was last stocked on Sept. 21, 2026 with 5,000 rainbow trout (9.6 in. average), according to the Utah DWR fish stocking report. It is a reservoir in Iron County, Utah. From 2021 to 2026, DWR stocked 139,731 fish here, the most of 23 stocked waters in Iron County.

Iron County

Stocking data fetched Nov. 10, 2026.

Last stockedSept. 21, 202650 days ago, rainbow trout

Fish stocked in 20265,0002 records

Records since 202129History back to 2002

Stocked species5rainbow trout, wiper and channel catfish

Recent stockings at Newcastle Reservoir

Sept. 21, 20265,000 rainbow trout, 9.6 in. average
Oct. 2, 20254,060 rainbow trout, 7.5 in. average
Sept. 30, 20258,120 rainbow trout, 7.5 in. average
Sept. 24, 20258,178 rainbow trout, 7.5 in. average
Sept. 16, 20252,999 wiper, 2.4 in. average
July 30, 20252,000 wiper, 2.6 in. average

Newest first, from the Utah DWR stocking report. Full stocking history.

Newcastle Reservoir facts

Last stocked: Sept. 21, 2026 (50 days ago): 5,000 rainbow trout
Stockings in 2026: 2 (5,000 fish): 5,000 rainbow trout
County: Iron County
Stocked since 2021: rainbow trout, wiper, channel catfish, brown trout and black crappie
Likely catch (DWR): rainbow trout and smallmouth bass
Average size stocked: 6.5 in. (2021 to 2026)
County rank: Most fish of 23 stocked waters in Iron County since 2021
Name in DWR report: NEWCASTLE RES
Nearest water: Willow Spring Pond, 11.7 mi
Rules: Water-specific rules in the 2026 guidebook

Newcastle Reservoir stocking report, last 12 months

Newcastle Reservoir: DWR stocking records since Nov. 10, 2025, newest first.

Sept. 21, 2026	Rainbow trout	2,500	9.6 in.
Sept. 21, 2026	Rainbow trout	2,500	9.6 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.

Newcastle Reservoir stocking profile

First record in the DWR report: March 12, 2002. Since then DWR has logged 142 stockings here in 25 different years, 908,978 fish in all.
Species stocked 2021 to 2026, by share of fish: rainbow trout 78% (109,514 fish), wiper 11% (15,600 fish), channel catfish 7% (9,338 fish), brown trout 3% (4,238 fish) and black crappie 1% (1,041 fish).
Busiest months in the record: October (25% of records) and September (25% of records).
Stocked fish averaged 6.5 in. from 2021 to 2026 (per-record averages ranged from 1.9 to 9.7 in.). The yearly average was 5.8 in. in 2021 and 6.4 in. in 2025.
Fish stocked 2021 to 2026: 139,731, the most of 23 stocked waters in Iron County and 44th of 1,076 statewide.
Nearest other water with a page: Willow Spring Pond, 11.7 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 Newcastle Reservoir stocked?

Based on DWR stocking records, 2021 to 2025. Stocked in 5 of those 5 years.

mid to late Julystocked in 3 of the last 5 years, mostly wiper.

mid Septemberstocked in 4 of the last 5 years, mostly channel catfish and rainbow trout.

early Octoberstocked in 3 of the last 5 years, mostly rainbow trout.

2025 stocking: 6 records, first on July 2, last on Oct. 2.

Years with a stocking in each third of the month, 2021 to 2025:012345

DWR does not publish stocking schedules. This is past stocking, not a promise. How we read patterns.

Newcastle Reservoir stocking history by year

Newcastle Reservoir: DWR stocking records per year. Fish counts are totals of all records that year; average length is weighted by the number of fish.
Year	Records	Fish	Avg. length	Species
2026	2	5,000	9.6 in.	Rainbow trout
2025	6	29,595	6.4 in.	Rainbow trout, Wiper, Brown trout
2024	3	23,203	6.6 in.	Rainbow trout, Wiper, Black crappie
2023	3	22,022	6.4 in.	Rainbow trout, Wiper
2022	9	30,312	6.7 in.	Rainbow trout, Channel catfish, Wiper
2021	6	29,599	5.8 in.	Rainbow trout, Channel catfish, Wiper
2020	5	25,901	7.3 in.	Rainbow trout, Wiper
2019	2	25,606	7.2 in.	Rainbow trout
2018	2	21,769	7.3 in.	Rainbow trout
2017	3	22,007	6.5 in.	Rainbow trout, Wiper
2016	3	24,429	6.6 in.	Rainbow trout, Wiper
2015	3	24,028	6.9 in.	Rainbow trout, Wiper
2014	5	21,725	7.8 in.	Rainbow trout, Wiper
2013	4	181,490	1.3 in.	Rainbow trout, Wiper
2012	7	21,142	8.0 in.	Rainbow trout, Wiper
2011	3	118,632	1.6 in.	Rainbow trout, Wiper
2010	5	24,296	7.1 in.	Rainbow trout, Wiper
2009	5	22,641	7.3 in.	Rainbow trout
2008	11	39,221	6.7 in.	Rainbow trout, Wiper
2007	11	41,313	6.7 in.	Cutthroat trout, Rainbow trout, Wiper
2006	5	29,029	3.2 in.	Cutthroat trout, Wiper, Rainbow trout
2005	14	34,528	6.7 in.	Rainbow trout, Wiper, Cutthroat trout
2004	11	36,527	6.6 in.	Rainbow trout, Tiger trout, Cutthroat trout
2003	9	33,941	6.9 in.	Rainbow trout, Cutthroat trout
2002	5	21,022	6.4 in.	Rainbow trout, Cutthroat trout

All stocking records 2021 to Nov. 10, 2025 (27)

Newcastle Reservoir: DWR stocking records 2021 to Nov. 10, 2025.

Oct. 2, 2025	Rainbow trout	4,060	7.5 in.
Sept. 30, 2025	Rainbow trout	8,120	7.5 in.
Sept. 24, 2025	Rainbow trout	8,178	7.5 in.
Sept. 16, 2025	Wiper	2,999	2.4 in.
July 30, 2025	Wiper	2,000	2.6 in.
July 2, 2025	Brown trout	4,238	5.5 in.
Sept. 25, 2024	Rainbow trout	20,002	7.0 in.
July 17, 2024	Wiper	2,160	2.0 in.
May 13, 2024	Black crappie	1,041	8.4 in.
Sept. 20, 2023	Rainbow trout	8,769	6.8 in.
Sept. 14, 2023	Rainbow trout	11,258	6.8 in.
Aug. 2, 2023	Wiper	1,995	2.5 in.
Oct. 5, 2022	Rainbow trout	5,100	7.1 in.
Oct. 4, 2022	Rainbow trout	7,446	7.1 in.
Oct. 3, 2022	Rainbow trout	7,480	7.1 in.
Sept. 13, 2022	Channel catfish	2,337	3.1 in.
July 27, 2022	Wiper	2,000	1.9 in.
May 11, 2022	Channel catfish	2,000	5.3 in.
Feb. 18, 2022	Rainbow trout	2,051	9.5 in.
Feb. 18, 2022	Rainbow trout	949	9.7 in.
Feb. 18, 2022	Rainbow trout	949	9.7 in.
Oct. 6, 2021	Rainbow trout	6,760	7.2 in.
Oct. 6, 2021	Rainbow trout	1,408	7.0 in.
Oct. 6, 2021	Rainbow trout	3,872	7.0 in.
Oct. 5, 2021	Rainbow trout	8,112	7.2 in.
Sept. 16, 2021	Channel catfish	5,001	4.0 in.
Aug. 12, 2021	Wiper	4,446	2.2 in.

Fishing rules

Newcastle Reservoir, Iron County2026 guidebook, p. 37

Wiper limit: 2.

From the 2026 Utah Fishing Guidebook, in our own words. Rules can change mid-year: check wildlife.utah.gov/guidebooks before fishing. See statewide limits.

Access and facilities

Other activities: OHV or 4WD trails, Swimming, Wildlife watching
Facilities: Restrooms
Boating: Boat ramp, Hand launch
Camping: Primitive tent camping

Facility list from DWR Fish Utah. Check with the land manager before you go; facilities close seasonally.

Email alerts

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Newcastle Reservoir questions

When is Newcastle Reservoir stocked?

DWR does not publish stocking schedules. Past records show Newcastle Reservoir was stocked in mid to late July (3 of the last 5 years), mid September (4 of the last 5 years) and early October (3 of the last 5 years). The most recent stocking in the DWR report is dated Sept. 21, 2026.

What fish are in Newcastle Reservoir?

DWR lists rainbow trout and smallmouth bass as likely catches and black crappie, channel catfish, green sunfish and wiper as possible. Since 2021 DWR has stocked rainbow trout, wiper, channel catfish, brown trout and black crappie.

Are there special fishing rules at Newcastle Reservoir?

Yes. The 2026 Utah Fishing Guidebook lists rules for this water, summarized on this page. Check the guidebook and DWR updates before fishing.

Sources

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.