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Fishing Shamrock Impoundment: what the data says
8-acre lake near Houston County. The lake tops out around 15 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. Below is the species-by-species picture, pulled from the same data the map uses.
Yellow Perch fishing at Shamrock Impoundment
Start shallow in spring: yellow perch sit in 3 to 12 ft that time of year. They move out to 5 to 15 ft in summer and finish the year down in 5 to 15 ft. Deep basin is the standout, a deep basin at roughly 13 ft, rated prime for fall yellow perch. Plan around early morning in the warm months. Tie on a drop-shot micro plastics or a small spoon tipped with worm and you're in the game.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 3 to 12 ft | midday & dawn | Small jig + curly tail, Perch-pattern micro crank |
| Summer | 5 to 15 ft | dawn | Drop-shot micro plastics, Small spoon tipped with worm |
| Fall | 5 to 15 ft | midday | Jigging spoon (small), Perch rig / spreader |
| Winter | 5 to 15 ft | midday & dawn | Tungsten jig + spikes, Rattle spoon (small) |
Northern Pike fishing at Shamrock Impoundment
Spring northern pike on Shamrock Impoundment hold shallow, usually 2 to 8 ft. They move out to 5 to 15 ft in summer and finish the year down in 5 to 15 ft. The spot to know is Break off the point, a drop-off in about 7 ft of water that rates prime for northern pike in fall. Plan around early morning and the evening in the warm months. Summer baits: a bucktail or a weedless spoon over cabbage gets it done.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 2 to 8 ft | midday & dawn | #5 inline spinner, Spoon (red/white) |
| Summer | 5 to 15 ft | dawn & dusk | Bucktail, Weedless spoon over cabbage |
| Fall | 5 to 15 ft | midday & dawn | Big rubber (Bull Dawg style), Husky-style jerkbait |
| Winter | 5 to 15 ft | midday | Tip-ups, Large jigging spoon |
Largemouth Bass fishing at Shamrock Impoundment
In spring, largemouth bass run shallow here, mostly 2 to 10 ft. They move out to 5 to 15 ft in summer and finish the year down in 5 to 15 ft. If you only fish one area, make it Main-lake point: a point around 8 ft that scores prime in fall. Plan around early morning and the evening in the warm months. A texas-rigged 10" worm or a deep-diving crankbait covers the summer program.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 2 to 10 ft | dawn & dusk | Spinnerbait, Chatterbait |
| Summer | 5 to 15 ft | dawn & dusk | Texas-rigged 10" worm, Deep-diving crankbait |
| Fall | 4 to 15 ft | midday & dawn | Squarebill crankbait (shad), Spinnerbait |
| Winter | 5 to 15 ft | midday | Blade bait, Jigging spoon |
Crappie fishing at Shamrock Impoundment
Start shallow in spring: crappie sit in 2 to 8 ft that time of year. They move out to 5 to 15 ft in summer and finish the year down in 5 to 15 ft. The spot to know is Deep basin, a deep basin in about 13 ft of water that rates prime for crappie in winter. Plan around early morning and the evening in the warm months. Summer baits: a jig trolled/spider-rigged or a small crankbait (trolled) gets it done.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 2 to 8 ft | midday & dawn | 1/16 oz jig + tube, Curly-tail grub |
| Summer | 5 to 15 ft | dawn & dusk | Jig trolled/spider-rigged, Small crankbait (trolled) |
| Fall | 5 to 15 ft | dawn | Jig + minnow combo, Small swimbait (1.5-2") |
| Winter | 5 to 15 ft | midday | Tungsten jig + soft plastic, Tiny jigging spoon |
Bluegill fishing at Shamrock Impoundment
Start shallow in spring: bluegill sit in 1 to 6 ft that time of year. By summer they slide out to 4 to 15 ft, and by winter most fish are in 5 to 15 ft. If you only fish one area, make it Deep basin: a deep basin around 13 ft that scores prime in winter. Best bite is early morning and the evening. Tie on a small sponge spider (fly) or a micro tube jig and you're in the game.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 1 to 6 ft | midday & dusk | 1/32 oz jig + micro plastic, Tiny popper (evenings) |
| Summer | 4 to 15 ft | dawn & dusk | Small sponge spider (fly), Micro tube jig |
| Fall | 5 to 15 ft | midday | Micro jig + waxworm, Small spoon tipped |
| Winter | 5 to 15 ft | midday | Tungsten ice jig + plastic, Tiny spoon |
Notable structure
- Deep basin: deep basin, around 13 ft
- Main-lake point: point, around 8 ft
- Break off the point: drop-off, around 7 ft
Common questions
How deep is Shamrock Impoundment?
Shamrock Impoundment is about 15 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 Shamrock Impoundment?
Anglers target largemouth bass, northern pike, crappie, bluegill, yellow perch on Shamrock Impoundment.
Where is the best fishing spot on Shamrock Impoundment?
Deep basin is the top-rated area: a deep basin in about 13 ft of water that rates prime for yellow perch in fall. Open the map above to see every rated spot for each species and season.
When is the best time to fish Shamrock Impoundment?
For yellow perch, the summer bite is best in early morning. Each species page section below lists the seasonal windows, and the map shows a live NOW badge when you're inside one.
Nearby waters
South Fork · Mississippi River Pool 8 (La Crosse) · Winona (South Bay) · Winona (North Bay) · Goodview · South Branch Root River
See how Shamrock Impoundment stacks up: best largemouth bass lakes in Minnesota · best northern pike lakes in Minnesota · best crappie lakes in Minnesota · best bluegill lakes in Minnesota
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