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179-acre reservoir in Cache County, Utah. The lake tops out around 112 ft. These contours are modeled — built from the real shoreline and the water's maximum depth — so read them as a guide, never as navigation. Here's the year, species by species, as the scoring engine sees it.
On the chart, Porcupine Reservoir draws 170 acres inside 4.1 miles of shoreline. The 2.2 development index tells the story — a convoluted bank whose fishable edge far outruns the acreage. Roughly 41% of the water is 15 ft or less as modeled, the band where the food chain lives. The basin spans about 1.4 mi end to end and 0.6 mi across at its widest. You'll find it in Cache County. Closest neighbour on DepthScout: Hyrum Reservoir, 9 mi northwest of here.
The spring pattern is a shallow one: kokanee in 10 to 30 ft. As the season builds they drop to 30 to 70 ft, wintering in 20 to 80 ft. Top water on the chart: Porcupine Creek inflow, an inflow / creek mouth in the 8 ft range, prime in fall. Time it for early morning. Summer baits: a dodger + pink/orange squid on downrigger or a kokanee bug + corn gets it done.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 10 to 30 ft | dawn | Deep basin (95 ft) | Small dodger + squid (pink), Wedding-ring spinner + corn |
| Summer | 30 to 70 ft | dawn | Break off the point (50 ft) | Dodger + pink/orange squid on downrigger, Kokanee bug + corn |
| Fall | 5 to 40 ft | dawn | Porcupine Creek inflow (8 ft) | Dodger + squid (deeper red/purple), Small spoon |
| Winter | 20 to 80 ft | dawn | Deep basin (95 ft) | Small glow jig + corn or maggot, Tiny spoon |
Start shallow in spring: rainbow trout sit in 5 to 20 ft that time of year. Summer pushes them deeper, 8 to 30 ft, and winter fish settle into 8 to 40 ft. The spot to know is Porcupine Creek inflow, an inflow / creek mouth in about 8 ft of water that rates prime for rainbow trout in spring. Warm-month bites cluster around early morning and the evening. Throw a dodger + spoon (deep troll) or a flutter spoon until the fish tell you otherwise.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 5 to 20 ft | dawn & dusk | Porcupine Creek inflow (8 ft) | Inline spinner (silver), Small spoon |
| Summer | 8 to 30 ft | dawn & dusk | Porcupine Creek inflow (8 ft) | Dodger + spoon (deep troll), Flutter spoon |
| Fall | 10 to 35 ft | dawn & dusk | Main-lake point (28 ft) | Casting spoon, Jerkbait over shoals |
| Winter | 8 to 40 ft | dawn | Porcupine Creek inflow (8 ft) | Jigging spoon, Tube jig (white) |
The spring pattern is a shallow one: lake trout in 10 to 40 ft. Midsummer fish sit out in 34 to 112 ft before dropping to 20 to 80 ft for winter. The spot to know is Deep basin, a deep basin in about 95 ft of water that rates prime for lake trout in summer. Plan around early morning in the warm months. Summer baits: a white tube jig (deep) or a magnum spoon on downrigger gets it done.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 10 to 40 ft | dawn & dusk | Main-lake point (28 ft) | Casting spoon over shoals, Jerkbait (shallow) |
| Summer | 34 to 112 ft | dawn | Deep basin (95 ft) | White tube jig (deep), Magnum spoon on downrigger |
| Fall | 10 to 50 ft | dusk & dawn | Main-lake point (28 ft) | Heavy casting spoon, Jigging rap over reefs |
| Winter | 20 to 80 ft | dawn | Break off the point (50 ft) | White tube jig, Airplane jig |
9 pieces of structure are mapped here — Deep basin, around 95 ft, is the deepest of them.
Access data: OpenStreetMap contributors (ODbL) — community-mapped launches. Confirm conditions and fees locally before you launch.
| Date | Species | Count | Size |
|---|---|---|---|
| Jun 24 | Lake Trout | 7,564 | ~4.1" |
| Jun 24 | Splake trout | 1,763 | ~2.7" |
| Jun 23 | Brook Trout | 57 | ~2.6" |
| May 21 | Rainbow trout | 931 | ~11" |
| May 19 | Rainbow trout | 1,386 | ~11.8" |
| May 18 | Rainbow trout | 1,120 | ~11.6" |
| May 18 | Rainbow trout | 1,705 | ~11.7" |
| Aug 18, 2025 | Splake trout | 1,764 | ~3.7" |
Source: Utah DWR fish-stocking report, retrieved 2026-08-18.
Season dates, license requirements, and size and bag limits for Utah waters are set by the Utah Division of Wildlife Resources — and special regulations can apply to Porcupine Reservoir specifically, so confirm the current rules before you fish.
Check the official Utah fishing regulations →
Porcupine Reservoir is about 112 ft (34 m) deep at its deepest point. The contours here are modeled from the water's real shape and maximum depth, so treat them as a rough guide.
Anglers target kokanee, rainbow trout, lake trout on Porcupine Reservoir.
Porcupine Creek inflow is the top-rated area: an inflow / creek mouth in about 8 ft of water that rates prime for rainbow trout in spring. Open the map above to see every rated spot for each species and season.
For kokanee, the summer bite is best in early morning. Each species page section below lists the seasonal windows, and the map shows a live NOW badge when you're inside one.
Yes — per Utah DWR fish-stocking report records, Porcupine Reservoir was most recently stocked Jun 24 with 7,564 lake trout. The full stocking history is listed above.
Fishing on Porcupine Reservoir is regulated by the Utah Division of Wildlife Resources. Check the official Utah regulations for current license requirements, season dates, and size and bag limits — special regulations can apply to this specific water.
Hyrum Reservoir 9 mi · Mantua Reservoir 10 mi · Causey Reservoir 17 mi · Pineview Reservoir 18 mi · Willard Bay Reservoir 21 mi · Birch Creek Reservoir 21 mi · Lost Creek Reservoir 29 mi · Newton Reservoir 29 mi · Bear Lake 38 mi, UT/ID · Lamont Reservoir 41 mi, ID · Foster Reservoir 42 mi, ID · Echo Reservoir 43 mi
See how Porcupine Reservoir stacks up: best rainbow trout lakes in Utah · best lake trout lakes in Utah · best kokanee lakes in Utah
Browse all Utah fishing maps or see every water on DepthScout. How we build these maps. Fish here with a sonar unit that logs? Send us your depth data and we'll improve this chart, credited to you. For fishing guidance only, never navigation.