Sign inSign up free Sign inSign up free Sign inSign up freeShared by DepthScout anglers. Exact spots stay private, always.
346-acre reservoir in Sevier County, Utah. The lake tops out around 12 ft. The depth picture is modeled, anchored to the true shoreline and the water's published max depth — a scouting aid, never a chart to run a boat by. Species by species, here's what the data says the year looks like.
On the chart, Koosharem Reservoir draws 408 acres inside 4.1 miles of shoreline. Index 1.5 on the shoreline: a few honest points and pockets, nothing labyrinthine. Nothing on this chart breaks 15 ft, which makes the whole surface littoral: weeds, bait and ambush cover everywhere. Figure 1.6 mi of water from one end to the other, 0.8 mi at the beam. You'll find it in Sevier County. Closest neighbour on DepthScout: Fish Lake, 8 mi southeast of here.
Early season cutthroat trout use the shallows, holding in 2 to 12 ft. Even in summer they hold at 3 to 12 ft; winter keeps them in 3 to 12 ft. Put Break off the point first on the milk run — a drop-off near 5 ft that grades prime for summer. In summer the feeding windows fall in early morning and the evening. Tie on a trolled spoon (small) or an inline spinner and you're in the game.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 12 ft | dawn & dusk | Main-lake point (8 ft) | Inline spinner (silver/gold), Small spoon |
| Summer | 3 to 12 ft | dawn & dusk | Break off the point (5 ft) | Trolled spoon (small), Inline spinner |
| Fall | 2 to 12 ft | dawn & dusk | Main-lake point (8 ft) | Casting spoon, Inline spinner |
| Winter | 3 to 12 ft | dawn | Break off the point (5 ft) | Small jigging spoon, Marabou jig |
The spring pattern is a shallow one: rainbow trout in 3 to 12 ft. The depth story barely changes: 3 to 12 ft through summer, 2 to 12 ft in winter. Top water on the chart: Break off the point, a drop-off in the 5 ft range, prime in winter. Time it for early morning and the evening. Summer baits: a dodger + spoon (deep troll) or a flutter spoon gets it done.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 12 ft | dawn & dusk | Main-lake point (8 ft) | Inline spinner (silver), Small spoon |
| Summer | 3 to 12 ft | dawn & dusk | Break off the point (5 ft) | Dodger + spoon (deep troll), Flutter spoon |
| Fall | 3 to 12 ft | dawn & dusk | Main-lake point (8 ft) | Casting spoon, Jerkbait over shoals |
| Winter | 2 to 12 ft | dawn | Break off the point (5 ft) | Jigging spoon, Tube jig (white) |
Start shallow in spring: brook trout sit in 2 to 12 ft that time of year. They don't go far with the seasons — 4 to 12 ft covers summer, 2 to 12 ft covers winter. The spot to know is Deep basin, a deep basin in about 10 ft of water that rates prime for brook trout in summer. Warm-month bites cluster around early morning and the evening. Throw a small spoon fished deep or a trolled lake-clear wobbler + worm until the fish tell you otherwise.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 12 ft | dawn & dusk | Main-lake point (8 ft) | Small inline spinner (gold), Tiny spoon |
| Summer | 4 to 12 ft | dawn & dusk | Deep basin (10 ft) | Small spoon fished deep, Trolled lake-clear wobbler + worm |
| Fall | 2 to 12 ft | midday & dawn | Main-lake point (8 ft) | Small spoon (orange), Spinner |
| Winter | 2 to 12 ft | dawn | Deep basin (10 ft) | Small jigging spoon, Tungsten jig + plastic |
The spring pattern is a shallow one: splake in 2 to 12 ft. The depth story barely changes: 4 to 12 ft through summer, 3 to 12 ft in winter. The spot to know is Break off the point, a drop-off in about 5 ft of water that rates prime for splake in summer. Plan around early morning and the evening in the warm months. Summer baits: a trolled spoon at the thermocline or a white tube jig (deep) gets it done.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 12 ft | dawn & dusk | Main-lake point (8 ft) | Small casting spoon (gold/orange), Inline spinner |
| Summer | 4 to 12 ft | dawn & dusk | Break off the point (5 ft) | Trolled spoon at the thermocline, White tube jig (deep) |
| Fall | 3 to 12 ft | dawn & dusk | Main-lake point (8 ft) | Casting spoon, Jerkbait |
| Winter | 3 to 12 ft | dawn | Break off the point (5 ft) | Jigging spoon tipped with minnow head, Small white tube |
Koosharem Reservoir carries 6 mapped structure features, topping out (or rather bottoming out) at Deep basin, about 10 ft down.
Access data: Utah DNR — Boat Ramps. Confirm conditions and fees locally before you launch.
| Date | Species | Count | Size |
|---|---|---|---|
| Mar 3 | Rainbow trout | 3,001 | ~9.3" |
| Nov 5, 2025 | Rainbow trout | 1,947 | ~10.4" |
| Oct 21, 2025 | Rainbow trout | 3,009 | ~7.9" |
| Oct 20, 2025 | Brook Trout | 835 | ~13.3" |
| Oct 20, 2025 | Rainbow trout | 6,000 | ~4.9" |
| Oct 20, 2025 | Tiger Trout | 1,980 | ~5.5" |
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 Koosharem Reservoir specifically, so confirm the current rules before you fish.
Check the official Utah fishing regulations →
Koosharem Reservoir is about 12 ft (4 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 cutthroat trout, rainbow trout, brook trout, splake on Koosharem Reservoir.
Break off the point is the top-rated area: a drop-off in about 5 ft of water that rates prime for cutthroat trout in summer. Every other rated spot, per species and season, is on the map above.
For cutthroat trout, the summer bite is best in early morning and the evening. 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, Koosharem Reservoir was most recently stocked Mar 3 with 3,001 rainbow trout. The full stocking history is listed above.
Fishing on Koosharem 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.
Fish Lake 8 mi · Johnson Reservoir 11 mi · Mill Meadow Reservoir 16 mi · Forsyth Reservoir 18 mi · Piute Reservoir 29 mi · Otter Creek Reservoir 29 mi · Nine Mile Reservoir 40 mi · Palisade Reservoir 43 mi · Ferron Reservoir 43 mi · Duck Fork Reservoir 45 mi · Lower Bowns Reservoir 46 mi · Millsite Reservoir 49 mi
See how Koosharem Reservoir stacks up: best rainbow trout lakes in Utah · best brook trout lakes in Utah · best cutthroat trout lakes in Utah · best splake 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.