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Fishing Seminoe Reservoir: what the data says
19,133-acre reservoir near Sinclair. A North Platte canyon reservoir in the Seminoe Mountains. Trout on the rocky shorelines, walleye working the flats. The lake tops out around 206 ft. The contours are modeled from the water's real shoreline and maximum depth. Treat them as a rough guide, and never use them for navigation. Here's the year, species by species, as the scoring engine sees it.
The chart traces 81.2 miles of shoreline here — 7 islands included. With a shoreline index of 6.6, this water is all arms and coves — edge habitat well beyond its acreage. 33% of the surface is littoral (under ~15 ft), per the model — cover, weeds and forage water.
Walleye fishing at Seminoe Reservoir
When the water first warms, walleye slide up into 4 to 15 ft. Summer is a 15 to 35 ft game here, winter a 20 to 40 ft one. Start at Medicine Bow River inflow. It's a inflow / creek mouth holding about 8 ft of water and rates prime come spring. The feeding windows run the evening and early morning. Keep a crawler harness on bottom bouncer or a deep crankbait (trolled) rigged through the warm months.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 4 to 15 ft | dusk & dawn | Medicine Bow River inflow (8 ft) | 1/8 oz jig + minnow, Hair jig |
| Summer | 15 to 35 ft | dusk & dawn | Sharp break (14 ft) | Crawler harness on bottom bouncer, Deep crankbait (trolled) |
| Fall | 12 to 40 ft | dusk & night | Sharp break (14 ft) | Jigging rap, Jig + big minnow |
| Winter | 20 to 40 ft | dusk & dawn | Sharp break (14 ft) | Jigging spoon + minnow head, Rattle bait |
Rainbow Trout fishing at Seminoe Reservoir
In spring, rainbow trout run shallow here, mostly 5 to 20 ft. Midsummer fish sit out in 8 to 30 ft before dropping to 8 to 40 ft for winter. Spring rainbow trout concentrate at Medicine Bow River inflow, a prime-rated inflow / creek mouth around 8 ft. Fish it in early morning and the evening and you'll meet the bite. You won't need more than a dodger + spoon (deep troll) or a flutter spoon most summer days.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 5 to 20 ft | dawn & dusk | Medicine Bow River inflow (8 ft) | Inline spinner (silver), Small spoon |
| Summer | 8 to 30 ft | dawn & dusk | Medicine Bow River inflow (8 ft) | Dodger + spoon (deep troll), Flutter spoon |
| Fall | 10 to 35 ft | dawn & dusk | Shoreline point (9 ft) | Casting spoon, Jerkbait over shoals |
| Winter | 8 to 40 ft | dawn | Sharp break (14 ft) | Jigging spoon, Tube jig (white) |
Brown Trout fishing at Seminoe Reservoir
When the water first warms, brown trout slide up into 3 to 25 ft. Summer is a 25 to 60 ft game here, winter a 5 to 35 ft one. Start at Medicine Bow River inflow. It's a inflow / creek mouth holding about 8 ft of water and rates prime come spring. The feeding windows run after dark and early morning. Keep a spoon at the thermocline or a deep stickbait (night) rigged through the warm months.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 25 ft | dawn & dusk | Medicine Bow River inflow (8 ft) | Stickbait off planer boards (shallow), Small spoon along mud lines |
| Summer | 25 to 60 ft | night & dawn | Main-lake point (52 ft) | Spoon at the thermocline, Deep stickbait (night) |
| Fall | 5 to 30 ft | dusk & dawn | Medicine Bow River inflow (8 ft) | Jerkbait over gravel, Casting spoon |
| Winter | 5 to 35 ft | dawn | Medicine Bow River inflow (8 ft) | Jigging spoon, Small stickbait (slow) |
Cutthroat Trout fishing at Seminoe Reservoir
When the water first warms, cutthroat trout slide up into 3 to 15 ft. Summer is a 10 to 35 ft game here, winter a 10 to 40 ft one. Start at Medicine Bow River inflow. It's a inflow / creek mouth holding about 8 ft of water and rates prime come spring. The feeding windows run early morning and the evening. Keep a trolled spoon (small) or a inline spinner rigged through the warm months.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 15 ft | dawn & dusk | Medicine Bow River inflow (8 ft) | Inline spinner (silver/gold), Small spoon |
| Summer | 10 to 35 ft | dawn & dusk | Sharp break (14 ft) | Trolled spoon (small), Inline spinner |
| Fall | 5 to 25 ft | dawn & dusk | Shoreline point (9 ft) | Casting spoon, Inline spinner |
| Winter | 10 to 40 ft | dawn | Sharp break (14 ft) | Small jigging spoon, Marabou jig |
Notable structure
- Deep basin: deep basin, around 175 ft
- Break off the point: drop-off, around 93 ft
- Main-lake point: point, around 52 ft
- Secondary point: point, around 52 ft
- Sharp break: drop-off, around 14 ft
- Shoreline point: point, around 9 ft
- Medicine Bow River inflow: inflow / creek mouth, around 8 ft
- Shallow bay flat: weed flat, around 6 ft
- Back-bay flat: weed flat, around 6 ft
- Rock reef: rock pile, around 3 ft
- Weed flat: weed flat, around 3 ft
- Rock reef: rock pile, around 2 ft
- Rock reef: rock pile, around 2 ft
Seminoe Reservoir fishing regulations
Season dates, license requirements, and size and bag limits for Wyoming waters are set by the Wyoming Game and Fish Department — and special regulations can apply to Seminoe Reservoir specifically, so confirm the current rules before you fish.
Check the official Wyoming fishing regulations →
Common questions
How deep is Seminoe Reservoir?
Seminoe Reservoir is about 206 ft (63 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.
What fish are in Seminoe Reservoir?
Anglers target walleye, rainbow trout, brown trout, cutthroat trout on Seminoe Reservoir.
Where is the best fishing spot on Seminoe Reservoir?
Medicine Bow River inflow is the top-rated area: a inflow / creek mouth in about 8 ft of water that rates prime for walleye in spring. Every other rated spot, per species and season, is on the map above.
When is the best time to fish Seminoe Reservoir?
For walleye, 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.
What are the fishing regulations for Seminoe Reservoir?
Fishing on Seminoe Reservoir is regulated by the Wyoming Game and Fish Department. Check the official Wyoming regulations for current license requirements, season dates, and size and bag limits — special regulations can apply to this specific water.
Nearby waters
Dome Rock Res 16 mi · Pathfinder Reservoir 20 mi · Shirley Basin Reservoir 28 mi · Beulah Belle Lake 34 mi · Teton Res 39 mi · Walker Jenkins Lake 40 mi · Saratoga Lake 44 mi · Good Reservoir 1 46 mi · North Platte River (Grey Reef) 48 mi · Rawlins City Res 51 mi · Turpin Creek Res 52 mi · Diamond Lake 53 mi
See how Seminoe Reservoir stacks up: best walleye lakes in Wyoming · best rainbow trout lakes in Wyoming · best brown trout lakes in Wyoming · best cutthroat trout lakes in Wyoming
Browse all Wyoming fishing maps or see every water on DepthScout. How we build these maps. For fishing guidance only, never navigation.