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397-acre reservoir in Daggett County, Utah. The lake tops out around 96 ft. What you see is a modeled chart: the shoreline is real, the max depth is published, and the contours between are estimated. Plan with it; don't navigate by it. What the data behind the map says about each species, season by season:
On the chart, Long Park Reservoir, North Slope draws 388 acres inside 4.4 miles of shoreline. Index 1.6 on the shoreline: a few honest points and pockets, nothing labyrinthine. 8% of the surface is littoral (under ~15 ft), per the model — cover, weeds and forage water. Figure 1.9 mi of water from one end to the other, 0.6 mi at the beam. You'll find it in Daggett County. Closest neighbour on DepthScout: Sheep Creek Lake, 1 mi southeast of here.
Start shallow in spring: arctic grayling sit in 2 to 10 ft that time of year. Summer pushes them deeper, 3 to 15 ft, and winter fish settle into 8 to 25 ft. The spot to know is Shallow bay flat, a feeding flat in about 6 ft of water that rates prime for arctic grayling in summer. Warm-month bites cluster around the evening and early morning. Throw a dry fly (parachute adams, elk hair caddis) or a small inline spinner until the fish tell you otherwise.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 10 ft | midday & dusk | Shallow bay flat (6 ft) | 1/16 oz spinner (silver), Small dry fly (Adams, Griffith's) |
| Summer | 3 to 15 ft | dusk & dawn | Shallow bay flat (6 ft) | Dry fly (parachute Adams, elk hair caddis), Small inline spinner |
| Fall | 6 to 20 ft | midday | Break off the point (43 ft) | Small spoon, Beadhead nymph under indicator |
| Winter | 8 to 25 ft | midday & dawn | Shallow bay flat (6 ft) | Tungsten jig + waxworm, Small jigging spoon (gold) |
Start shallow in spring: brook trout sit in 2 to 15 ft that time of year. Summer pushes them deeper, 10 to 30 ft, and winter fish settle into 3 to 20 ft. The spot to know is Shallow bay flat, a feeding flat in about 6 ft of water that rates good for brook trout in spring. 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 15 ft | dawn & dusk | Shallow bay flat (6 ft) | Small inline spinner (gold), Tiny spoon |
| Summer | 10 to 30 ft | dawn & dusk | open water | Small spoon fished deep, Trolled lake-clear wobbler + worm |
| Fall | 2 to 15 ft | midday & dawn | open water | Small spoon (orange), Spinner |
| Winter | 3 to 20 ft | dawn | Shallow bay flat (6 ft) | Small jigging spoon, Tungsten jig + plastic |
The spring pattern is a shallow one: rainbow trout in 5 to 20 ft. As the season builds they drop to 8 to 30 ft, wintering in 8 to 40 ft. Top water on the chart: Main-lake point, a point in the 24 ft range, prime in fall. 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 | 5 to 20 ft | dawn & dusk | Main-lake point (24 ft) | Inline spinner (silver), Small spoon |
| Summer | 8 to 30 ft | dawn & dusk | Main-lake point (24 ft) | Dodger + spoon (deep troll), Flutter spoon |
| Fall | 10 to 35 ft | dawn & dusk | Main-lake point (24 ft) | Casting spoon, Jerkbait over shoals |
| Winter | 8 to 40 ft | dawn | Break off the point (43 ft) | Jigging spoon, Tube jig (white) |
Count 6 structure marks on this chart. The deepest, Deep basin, sits near 82 ft.
Access data: Utah DNR — Boat Ramps. Confirm conditions and fees locally before you launch.
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 Long Park Reservoir, North Slope specifically, so confirm the current rules before you fish.
Check the official Utah fishing regulations →
Long Park Reservoir, North Slope is about 96 ft (29 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 arctic grayling, brook trout, rainbow trout on Long Park Reservoir, North Slope.
Shallow bay flat is the top-rated area: a feeding flat in about 6 ft of water that rates prime for arctic grayling in summer. Scroll up to the map for the complete spot list by species and season.
For arctic grayling, the summer bite is best in the evening and early morning. Each species page section below lists the seasonal windows, and the map shows a live NOW badge when you're inside one.
Fishing on Long Park Reservoir, North Slope 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.
Sheep Creek Lake 1 mi · Browne Lake 4 mi · Spirit Lake 9 mi · East Park Reservoir 18 mi · Flaming Gorge Reservoir 25 mi, UT/WY · Stateline Res 28 mi · Uinta Mountains, North Slope Roadside Lakes 29 mi · Lake Blanchard 29 mi · Graham Reservoir Number 1 30 mi, WY · Green River (Flaming Gorge) 31 mi · Matt Warner Reservoir 31 mi · Steinaker Reservoir 32 mi
See how Long Park Reservoir, North Slope stacks up: best rainbow trout lakes in Utah · best brook trout lakes in Utah · best arctic grayling lakes in Utah
More water nearby: Daggett County fishing maps (5 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.