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Fishing Guernsey Slough: what the data says
8-acre reservoir near Casper Region. The lake tops out around 12 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 is how the season plays out for each species, straight from the data behind the map.
Channel Catfish fishing at Guernsey Slough
Start shallow in spring: channel catfish sit in 3 to 12 ft that time of year. Summer fish stay in 4 to 12 ft, and winter fish hold in 4 to 12 ft. If you only fish one area, make it Deep basin: a deep basin around 10 ft that scores prime in winter. In summer the feeding windows fall in after dark and the evening.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 3 to 12 ft | dusk | |
| Summer | 4 to 12 ft | night & dusk | |
| Fall | 4 to 12 ft | dusk | |
| Winter | 4 to 12 ft | midday |
Largemouth Bass fishing at Guernsey Slough
Start shallow in spring: largemouth bass sit in 2 to 10 ft that time of year. By summer they slide out to 4 to 12 ft, and by winter most fish are in 4 to 12 ft. If you only fish one area, make it Shallow bay flat: a weed flat around 3 ft that scores prime in spring. Plan around early morning and the evening in the warm months. Summer baits: a texas-rigged 10" worm or a deep-diving crankbait gets it done.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 2 to 10 ft | dawn & dusk | Spinnerbait, Chatterbait |
| Summer | 4 to 12 ft | dawn & dusk | Texas-rigged 10" worm, Deep-diving crankbait |
| Fall | 3 to 12 ft | midday & dawn | Squarebill crankbait (shad), Spinnerbait |
| Winter | 4 to 12 ft | midday | Blade bait, Jigging spoon |
Rainbow Trout fishing at Guernsey Slough
Start shallow in spring: rainbow trout sit in 3 to 12 ft that time of year. Summer fish stay in 3 to 12 ft, and winter fish hold in 2 to 12 ft. If you only fish one area, make it Break off the point: a drop-off around 5 ft that scores prime in winter. Best bite is early morning and the evening. Summer baits: a dodger + spoon (deep troll) or a flutter spoon gets it done.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 3 to 12 ft | dawn & dusk | Inline spinner (silver), Small spoon |
| Summer | 3 to 12 ft | dawn & dusk | Dodger + spoon (deep troll), Flutter spoon |
| Fall | 3 to 12 ft | dawn & dusk | Casting spoon, Jerkbait over shoals |
| Winter | 2 to 12 ft | dawn | Jigging spoon, Tube jig (white) |
Crappie fishing at Guernsey Slough
Start shallow in spring: crappie sit in 2 to 8 ft that time of year. Summer pushes them deeper, 4 to 12 ft, and winter fish settle into 4 to 12 ft. The spot to know is Deep basin, a deep basin in about 10 ft of water that rates prime for crappie in winter. In summer the feeding windows fall in early morning and the evening. Tie on a jig trolled/spider-rigged or a small crankbait (trolled) and you're in the game.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 2 to 8 ft | midday & dawn | 1/16 oz jig + tube, Curly-tail grub |
| Summer | 4 to 12 ft | dawn & dusk | Jig trolled/spider-rigged, Small crankbait (trolled) |
| Fall | 4 to 12 ft | dawn | Jig + minnow combo, Small swimbait (1.5-2") |
| Winter | 4 to 12 ft | midday | Tungsten jig + soft plastic, Tiny jigging spoon |
Bluegill fishing at Guernsey Slough
Spring bluegill on Guernsey Slough hold shallow, usually 1 to 6 ft. They move out to 3 to 12 ft in summer and finish the year down in 4 to 12 ft. If you only fish one area, make it Shallow bay flat: a weed flat around 3 ft that scores prime in spring. Best bite is early morning and the evening. Summer baits: a small sponge spider (fly) or a micro tube jig gets it done.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 1 to 6 ft | midday & dusk | 1/32 oz jig + micro plastic, Tiny popper (evenings) |
| Summer | 3 to 12 ft | dawn & dusk | Small sponge spider (fly), Micro tube jig |
| Fall | 4 to 12 ft | midday | Micro jig + waxworm, Small spoon tipped |
| Winter | 4 to 12 ft | midday | Tungsten ice jig + plastic, Tiny spoon |
Pumpkinseed fishing at Guernsey Slough
Spring pumpkinseed on Guernsey Slough hold shallow, usually 1 to 8 ft. They move out to 2 to 10 ft in summer and finish the year down in 4 to 12 ft. The spot to know is Shallow bay flat, a weed flat in about 3 ft of water that rates prime for pumpkinseed in spring. Plan around the evening and early morning in the warm months. Summer baits: a micro tube or a sponge spider (fly) gets it done.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 1 to 8 ft | midday & dusk | Micro jig under a float, Tiny beetle-spin |
| Summer | 2 to 10 ft | dusk & dawn | Micro tube, Sponge spider (fly) |
| Fall | 3 to 12 ft | dusk & dawn | Micro jig + waxworm, Small spoon tipped |
| Winter | 4 to 12 ft | dawn | Tungsten ice jig + plastic, Tiny spoon |
Notable structure
- Deep basin: deep basin, around 10 ft
- Main-lake point: point, around 8 ft
- Secondary point: point, around 8 ft
- Break off the point: drop-off, around 5 ft
- Shallow bay flat: weed flat, around 3 ft
- Back-bay flat: weed flat, around 3 ft
Common questions
How deep is Guernsey Slough?
Guernsey Slough is about 12 ft 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 Guernsey Slough?
Anglers target largemouth bass, crappie, bluegill, channel catfish, rainbow trout, pumpkinseed on Guernsey Slough.
Where is the best fishing spot on Guernsey Slough?
Deep basin is the top-rated area: a deep basin in about 10 ft of water that rates prime for channel catfish in winter. Open the map above to see every rated spot for each species and season.
When is the best time to fish Guernsey Slough?
For channel catfish, the summer bite is best in after dark 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.
Nearby waters
Grayrocks Reservoir · Glendo Reservoir · Rock Lake · Bump Sullivan Res · Springer Res · Packers Lake
See how Guernsey Slough stacks up: best largemouth bass lakes in Wyoming · best crappie lakes in Wyoming · best bluegill lakes in Wyoming · best channel catfish lakes in Wyoming
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