reservoir

Porcupine Reservoir

Cache County · Northern region — Kokanee water above Avon; fall spawning run in the East Fork Little Bear.

Fairconditions
38%fullas of Sep 30 · 4,313 of 11,300 af
Empty38% on Sep 3035% typical for end of SepFull pool

Today’s report

Porcupine Reservoir is a fair bet today. The reservoir is 38% full as of September 30 (the operator posts a month-end level, not daily), about normal for the date, and drawing down over the last month. The DWR last stocked lake trout (7,564 fish) on June 24. This Afternoon's forecast: sunny, 66°F.

Current conditions

38% full
Level · Sep 30 (−1 pts / 30d)
4,313af
Storage (-3.3% / 30d)

Stocking

Last stocked Jun 24, 2026 — lake trout (7,564 fish).

DateSpeciesQuantityAvg length
Jun 24, 2026lake trout7,5644.1"
Jun 24, 2026splake (lake × brook trout hybrid)1,7632.71"
May 21, 2026rainbow trout93110.96"
May 19, 2026rainbow trout1,38611.75"
May 18, 2026rainbow trout1,70511.73"
May 18, 2026rainbow trout1,12011.6"
Aug 18, 2025splake (lake × brook trout hybrid)1,7643.66"
Jun 1, 2025lake trout3,7533.7"

Best time to fish Porcupine Reservoir

The DWR has stocked Porcupine Reservoir 23 times over the last 5 seasons, and 87% of those plants landed in April through June — the freshest fish and the easiest bite usually follow within a week or two of a stocking.

Species

kokanee salmonbrown troutcutthroat trout

Location

41.52100, -111.74600 · Cache County · 14 mi from Brigham City

Nearby waters (within ~25 mi):

Blacksmith Fork RiverCache CountyGoodHyrum ReservoirCache CountyToughMantua ReservoirBox Elder CountyWarningWellsville ReservoirCache CountyFairNorth PondWashington CountyFairLogan RiverCache CountyGoodWillard Peak PondBox Elder CountyWarningCausey ReservoirWeber CountyFair

Regulations

  • Limit 12 trout and kokanee salmon, only 4 may be rainbow, cutthroat or brown trout (a combined total). To take 12 fish, you must possess at least 8 kokanee.
  • See East Fork Little Bear River.
  • Operating a boat above wakeless speed is prohibited.
  • An angler may use up to six lines when fishing through the ice. If the angler is using more than two lines, the angler's name must be attached to each line, pole or tip-up, and the angler may check only their lines.

Special rules from the 2026 Utah Fishing Guidebook. Statewide daily limits apply to anything not listed. Rules change — always verify in the current guidebook before you fish.

This week’s weather

This Afternoon
66°F
Sunny
Tonight
46°F
Mostly Clear
Sunday
65°F
Sunny
Sunday Night
46°F
Mostly Clear
Monday
65°F
Sunny
Monday Night
49°F
Partly Cloudy
Tuesday
64°F
Mostly Sunny then Chance Showers And Thunderstorms
30% precip
Tuesday Night
47°F
Slight Chance Showers And Thunderstorms then Partly Cloudy
24% precip
Wednesday
65°F
Slight Chance Light Rain then Slight Chance Showers And Thunderstorms
24% precip
Wednesday Night
47°F
Chance Light Rain
40% precip