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420-acre reservoir in Emery County, Utah. The lake tops out around 52 ft. The chart is a model: real shoreline, published maximum depth, interpolated in between. A planning tool, never a navigation product. Species by species, here's what the data says the year looks like.
On the chart, Millsite Reservoir draws 432 acres inside 7.1 miles of shoreline. That shoreline is heavily fingered (development index 2.4) — bays, points and pockets everywhere, which multiplies the fishable edge. Littoral water — the productive band under ~15 ft — makes up 55% of this chart, as modeled. Tip to tip the water measures near 1.5 mi with a 1.2-mi widest point. The water lies in Emery County. The nearest mapped water is Ferron Reservoir, 14 mi to the west.
Spring cutthroat trout on Millsite Reservoir hold shallow, usually 3 to 15 ft. They move out to 10 to 35 ft in summer and finish the year down in 10 to 40 ft. Put Creek inflow first on the milk run — an inflow / creek mouth near 5 ft that grades prime for spring. The feeding windows run early morning and the evening. The summer box starts with a trolled spoon (small) or an inline spinner.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 15 ft | dawn & dusk | Creek inflow (5 ft) | Inline spinner (silver/gold), Small spoon |
| Summer | 10 to 35 ft | dawn & dusk | Break off the point (23 ft) | Trolled spoon (small), Inline spinner |
| Fall | 5 to 25 ft | dawn & dusk | Main-lake point (13 ft) | Casting spoon, Inline spinner |
| Winter | 10 to 40 ft | dawn | Break off the point (23 ft) | Small jigging spoon, Marabou jig |
Start shallow in spring: rainbow trout sit in 5 to 20 ft that time of year. Warm water sends them out to 8 to 30 ft; cold water stacks them in 8 to 40 ft. Top water on the chart: Creek inflow, an inflow / creek mouth in the 5 ft range, prime in spring. Fish it in early morning and the evening and you'll meet the bite. 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 | Creek inflow (5 ft) | Inline spinner (silver), Small spoon |
| Summer | 8 to 30 ft | dawn & dusk | Old creek channel (26 ft) | Dodger + spoon (deep troll), Flutter spoon |
| Fall | 10 to 35 ft | dawn & dusk | Main-lake point (13 ft) | Casting spoon, Jerkbait over shoals |
| Winter | 8 to 40 ft | dawn | Break off the point (23 ft) | Jigging spoon, Tube jig (white) |
Start shallow in spring: splake sit in 5 to 25 ft that time of year. Summer pushes them deeper, 16 to 52 ft, and winter fish settle into 10 to 45 ft. The spot to know is Break off the point, a drop-off in about 23 ft of water that rates prime for splake in summer. Warm-month bites cluster around early morning and the evening. Throw a trolled spoon at the thermocline or a white tube jig (deep) until the fish tell you otherwise.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 5 to 25 ft | dawn & dusk | Main-lake point (13 ft) | Small casting spoon (gold/orange), Inline spinner |
| Summer | 16 to 52 ft | dawn & dusk | Break off the point (23 ft) | Trolled spoon at the thermocline, White tube jig (deep) |
| Fall | 10 to 35 ft | dawn & dusk | Main-lake point (13 ft) | Casting spoon, Jerkbait |
| Winter | 10 to 45 ft | dawn | Break off the point (23 ft) | Jigging spoon tipped with minnow head, Small white tube |
Structure-wise the chart holds 9 features, led in depth by Deep basin at roughly 44 ft.
Access data: Utah DNR — Boat Ramps. Confirm conditions and fees locally before you launch.
| Date | Species | Count | Size |
|---|---|---|---|
| Jul 21 | Splake trout | 5,004 | ~2.7" |
| May 12 | Tiger Trout | 4,950 | ~3" |
| Mar 24 | Rainbow trout | 3,900 | ~10" |
| Mar 24 | Rainbow trout | 3,000 | ~10" |
| Oct 27, 2025 | Cutthroat trout | 3,990 | ~2.3" |
| Jul 23, 2025 | Splake trout | 10,031 | ~3.6" |
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 Millsite Reservoir specifically, so confirm the current rules before you fish.
Check the official Utah fishing regulations →
Millsite Reservoir is about 52 ft (16 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, splake on Millsite Reservoir.
Creek inflow is the top-rated area: an inflow / creek mouth in about 5 ft of water that rates prime for cutthroat trout in spring. 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, Millsite Reservoir was most recently stocked Jul 21 with 5,004 splake trout. The full stocking history is listed above.
Fishing on Millsite 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.
Ferron Reservoir 14 mi · Joes Valley Reservoir 14 mi · Duck Fork Reservoir 14 mi · Huntington North Reservoir 22 mi · Palisade Reservoir 26 mi · Nine Mile Reservoir 28 mi · Miller Flat Reservoir 30 mi · Cleveland Reservoir 33 mi · Huntington 34 mi · Electric Lake 36 mi · Johnson Reservoir 41 mi · Gooseberry Reservoir 43 mi
See how Millsite Reservoir stacks up: best rainbow trout lakes in Utah · best cutthroat trout lakes in Utah · best splake lakes in Utah
More water nearby: Emery County fishing maps (6 charts). 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.