Koosharem Reservoir Fish Stocking
SEVIER County, Utah · 1979–2026 on record
According to Utah DWR — Fish Stocking Report, Koosharem Reservoir was last stocked March 3, 2026 with Rainbow Trout. Koosharem Reservoir has 283 stocking records on file, spanning 1979–2026, with about 1,524,786 fish stocked over that period.
When Koosharem Reservoir is stocked
Koosharem Reservoir is typically stocked in spring, most often in May — 69 stocking events in that peak month.
By species
Angler's Field Guide
Fishing Tips & Stocking Guide for Koosharem Reservoir
Practical advice on fish behavior, recommended tackle, and state regulations for anglers fishing in SEVIER County, Utah.
Post-Plant Behavior & Timing
Hatchery-raised fish are conditioned to pelleted feed and open raceways. Following a release into Koosharem Reservoir, they typically congregate in schools near public access points, boat ramps, or inlets for the first 24 to 48 hours while adjusting to natural water conditions.
Since Koosharem Reservoir was last stocked March 3, 2026, anglers visiting within 1 to 2 weeks of a reported event generally experience the highest activity before fish disperse into deeper cover.
State Regulations & Licensing
- •Fishing License: A valid Utah freshwater fishing license is required for anglers age 16 and older.Purchase Utah license online →
- •Official Rules & Limits: Bag limits, bait restrictions, and seasonal boundaries are set by Utah fish & wildlife agency.Official Utah regulations guidebook →
- •Ethical Conservation: Use barbless hooks and keep fish submerged in water during unhooking.Trout Thermal Advisory: When water temperatures rise above 68°F (20°C), released trout face severe mortality from thermal exhaustion. Target warmwater species or fish early in the morning when lakes and streams warm up.
Recommended Tackle & Presentations
Techniques tailored to the species stocked in Koosharem Reservoir:
Stocked Trout Tactics
Use light 4–6 lb monofilament or fluorocarbon line. Float scented dough bait (PowerBait) 12–18" off bottom using a sliding slip-sinker rig with a size 14–16 treble hook. For active casting, throw 1/16 to 1/8 oz inline spinners (Panther Martin, Rooster Tail) or small spoons (Kastmaster) along drop-offs.
Rainbow Trout Profile Tips
The most commonly targeted stocked trout in the country, taken on bait, spinners, and flies alike; a common first fish for new anglers.
Brook Trout Profile Tips
A favorite of high-country and small-stream anglers; often more willing to strike than brown or rainbow trout in the same water.
Recommended Tackle for Koosharem Reservoir
Field-tested tackle and presentations matched to the species stocked here.
Berkley PowerBait Floating Trout Dough
Hatchery-raised trout are conditioned to pelleted scents; scented dough floated 12–18 inches off bottom consistently triggers strikes.
Panther Martin Classic Teardrop Inline Spinner
The heavy convex blade spins instantly upon retrieval, sending vibration through the water that triggers aggressive reaction bites along drop-offs.
Sliding Sinker & Treble Hook Rigging Kit
Sliding egg sinkers allow cautious trout to run with bait without feeling line drag, while size 14–16 treble hooks keep dough bait securely pinned.
As an Amazon Associate, StockedWaters earns from qualifying purchases at no additional cost to you. Recommendations are chosen for hatchery-conditioned fish behavior and ethical rigging. We may receive a referral commission if you buy through these links. Read our editorial policy & standards.
Nearby stocked waters
Other stocked waters near Koosharem Reservoir, freshest activity first.
Fish Lake
8 miSEVIER County · 9 species · 1940 records
Last stocked July 2026
Aberdunk Lake Fl
9 miSEVIER County · 3 species · 49 records
Last stocked July 2026
Stone Lake Fl
10 miSEVIER County · 1 species · 43 records
Last stocked July 2026
Glenwood Pond
13 miSEVIER County · 3 species · 157 records
Last stocked May 2026
Otter Creek
7 miPIUTE County · 5 species · 90 records
Last stocked May 2026
Annabella Reservoir
9 miSEVIER County · 1 species · 48 records
Last stocked April 2026
Stocking history
Most recent stockings first. Dates shown at the precision the agency reported.
| Date | Species | Number | Size | Source |
|---|---|---|---|---|
| March 3, 2026 | Rainbow Trout | 3,001 | 9.32" | Utah DWR |
| March 3, 2026 | Rainbow Trout | 3,001 | 9.32" | Utah DWR |
| November 5, 2025 | Rainbow Trout | 1,947 | 10.39" | Utah DWR |
| October 21, 2025 | Rainbow Trout | 3,009 | 7.85" | Utah DWR |
| October 20, 2025 | Brook Trout | 835 | 13.27" | Utah DWR |
| October 20, 2025 | Rainbow Trout | 6,000 | 4.92" | Utah DWR |
| October 20, 2025 | Tiger Trout | 1,980 | 5.46" | Utah DWR |
| June 9, 2025 | Splake | 2,002 | 3.5" | Utah DWR |
Show 42 more stocking records →
| Date | Species | Number | Size | Source |
|---|---|---|---|---|
| April 9, 2025 | Rainbow Trout | 1,515 | 9.63" | Utah DWR |
| April 2, 2025 | Rainbow Trout | 2,240 | 9.63" | Utah DWR |
| April 2, 2025 | Rainbow Trout | 2,240 | 9.63" | Utah DWR |
| March 27, 2025 | Cutthroat Trout | 5,088 | 8.14" | Utah DWR |
| October 28, 2024 | Tiger Trout | 2,050 | 5.59" | Utah DWR |
| July 11, 2024 | Tiger Trout | 2,760 | 3.28" | Utah DWR |
| July 8, 2024 | Splake | 2,000 | 2.67" | Utah DWR |
| May 15, 2024 | Rainbow Trout | 1,679 | 9.55" | Utah DWR |
| May 7, 2024 | Rainbow Trout | 2,162 | 9.55" | Utah DWR |
| May 7, 2024 | Rainbow Trout | 2,162 | 9.55" | Utah DWR |
| March 18, 2024 | Cutthroat Trout | 5,555 | 8.22" | Utah DWR |
| October 16, 2023 | Tiger Trout | 2,001 | 5.92" | Utah DWR |
| August 17, 2023 | Brook Trout | 2,671 | 3.15" | Utah DWR |
| August 17, 2023 | Brook Trout | 5,384 | 3.34" | Utah DWR |
| July 5, 2023 | Splake | 2,007 | 3.65" | Utah DWR |
| May 10, 2023 | Rainbow Trout | 2,003 | 9.53" | Utah DWR |
| May 3, 2023 | Rainbow Trout | 2,198 | 9.48" | Utah DWR |
| April 26, 2023 | Rainbow Trout | 1,800 | 9.44" | Utah DWR |
| April 13, 2023 | Cutthroat Trout | 1,900 | 9.36" | Utah DWR |
| April 13, 2023 | Cutthroat Trout | 4,180 | 9.36" | Utah DWR |
| April 5, 2022 | Rainbow Trout | 1,050 | 10" | Utah DWR |
| April 5, 2022 | Rainbow Trout | 1,050 | 10" | Utah DWR |
| April 1, 2022 | Rainbow Trout | 1,950 | 9.87" | Utah DWR |
| April 1, 2022 | Rainbow Trout | 1,950 | 9.87" | Utah DWR |
| March 28, 2022 | Cutthroat Trout | 5,100 | 8.24" | Utah DWR |
| May 4, 2021 | Rainbow Trout | 724 | 9.42" | Utah DWR |
| May 4, 2021 | Rainbow Trout | 724 | 9.42" | Utah DWR |
| May 4, 2021 | Rainbow Trout | 724 | 9.42" | Utah DWR |
| May 4, 2021 | Rainbow Trout | 724 | 9.42" | Utah DWR |
| May 4, 2021 | Rainbow Trout | 724 | 9.42" | Utah DWR |
| April 20, 2021 | Tiger Trout | 1,000 | 1.05" | Utah DWR |
| April 20, 2021 | Rainbow Trout | 2,376 | 9.44" | Utah DWR |
| March 29, 2021 | Cutthroat Trout | 5,152 | 8.11" | Utah DWR |
| March 25, 2021 | Rainbow Trout | 695 | 15.36" | Utah DWR |
| March 25, 2021 | Rainbow Trout | 704 | 15.36" | Utah DWR |
| July 6, 2020 | Tiger Trout | 1,995 | 3.69" | Utah DWR |
| June 15, 2020 | Splake | 2,000 | 3.05" | Utah DWR |
| April 28, 2020 | Tiger Trout | 300 | 1.19" | Utah DWR |
| April 28, 2020 | Tiger Trout | 300 | 1.19" | Utah DWR |
| April 22, 2020 | Rainbow Trout | 900 | 10.56" | Utah DWR |
| April 22, 2020 | Rainbow Trout | 900 | 10.56" | Utah DWR |
| April 22, 2020 | Rainbow Trout | 1,003 | 11.02" | Utah DWR |
Showing 50 of 283 stocking records.
Frequently asked
When was Koosharem Reservoir last stocked?
According to Utah DWR — Fish Stocking Report, Koosharem Reservoir was last stocked March 3, 2026 with Rainbow Trout.
What fish species are stocked in Koosharem Reservoir?
Koosharem Reservoir is stocked with Rainbow Trout, Brook Trout, Tiger Trout, Splake, and Cutthroat Trout.
What time of year is Koosharem Reservoir stocked?
Koosharem Reservoir is typically stocked in spring, most often in May.
How often is Koosharem Reservoir stocked?
Koosharem Reservoir has been stocked about 6 times a year — 283 recorded stockings between 1979 and 2026.
How many fish have been stocked in Koosharem Reservoir?
About 1,524,786 fish have been stocked in Koosharem Reservoir across 283 recorded events since 1979, per Utah fish & wildlife agency.
What size are the fish stocked in Koosharem Reservoir?
Fish stocked in Koosharem Reservoir average about 7.3 inches, based on the sizes the agency reported.
Do you need a fishing license to fish Koosharem Reservoir?
Yes, all anglers age 16 and older generally need a valid Utah freshwater fishing license. Always review current regulations from Utah fish & wildlife agency for site-specific rules, bag limits, or stamps.
How do you catch stocked trout in Koosharem Reservoir?
Freshly stocked trout in Koosharem Reservoir typically respond well to floating dough bait (such as PowerBait) floated 12–18 inches off bottom on light 4–6 lb leader, live nightcrawlers under a bobber, and small inline spinners or spoons retrieved along shorelines and drop-offs.