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9,000-acre flowage near Merrimac. The lake tops out around 24 ft. Contours on this water are modeled from its actual shoreline and max depth. Good for finding likely water, never for navigation. What the data behind the map says about each species, season by season:
The drawn water covers 8,473 acres wrapped in 69.7 miles of bank — 2 islands included. An index of 5.4 puts the bank firmly in maze territory: point after pocket after cove, every one a casting target. About 84% of the surface sits shallower than 15 ft on the modeled chart — that's the weed-and-bait zone. Tip to tip the water measures near 14.8 mi with a 4.8-mi widest point. It sits in Sauk County. If the bite dies, Lantz Pond is 5 mi to the south.
Start shallow in spring: walleye sit in 4 to 15 ft that time of year. Warm water sends them out to 7 to 24 ft; cold water stacks them in 7 to 24 ft. Top water on the chart: Spring Creek inflow, an inflow / creek mouth in the 4 ft range, prime in spring. Fish it in the evening and early morning and you'll meet the bite. Throw a crawler harness on bottom bouncer or a deep crankbait (trolled) until the fish tell you otherwise.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 4 to 15 ft | dusk & dawn | Spring Creek inflow (4 ft) | 1/8 oz jig + minnow, Hair jig |
| Summer | 7 to 24 ft | dusk & dawn | Break off the point (11 ft) | Crawler harness on bottom bouncer, Deep crankbait (trolled) |
| Fall | 7 to 24 ft | dusk & night | Break off the point (11 ft) | Jigging rap, Jig + big minnow |
| Winter | 7 to 24 ft | dusk & dawn | Deep basin (20 ft) | Jigging spoon + minnow head, Rattle bait |
Start shallow in spring: sauger sit in 4 to 18 ft that time of year. Summer pushes them deeper, 7 to 24 ft, and winter fish settle into 7 to 24 ft. The spot to know is Spring Creek inflow, an inflow / creek mouth in about 4 ft of water that rates prime for sauger in spring. Warm-month bites cluster around early morning and the evening. Throw a bottom bouncer + crawler or a 3-way rig with stickbait until the fish tell you otherwise.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 4 to 18 ft | dawn & dusk | Spring Creek inflow (4 ft) | 3/8 oz jig + ringworm, Hair jig + minnow |
| Summer | 7 to 24 ft | dawn & dusk | Old creek channel (12 ft) | Bottom bouncer + crawler, 3-way rig with stickbait |
| Fall | 7 to 24 ft | dusk & dawn | Old creek channel (12 ft) | Jig + big minnow, Blade bait |
| Winter | 7 to 24 ft | dusk | Deep basin (20 ft) | Heavy jigging spoon, Jig + minnow (vertical) |
Spring white bass & hybrids on Lake Wisconsin hold shallow, usually 3 to 15 ft. They move out to 7 to 24 ft in summer and finish the year down in 7 to 24 ft. Put Spring Creek inflow first on the milk run — an inflow / creek mouth near 4 ft that grades prime for spring. The feeding windows run early morning and the evening. The summer box starts with a jigging spoon or a topwater (when schooling).
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 15 ft | midday & dawn | Spring Creek inflow (4 ft) | Rooster tail / inline spinner, Curly-tail jig (white/chartreuse) |
| Summer | 7 to 24 ft | dawn & dusk | Main-lake point (8 ft) | Jigging spoon, Topwater (when schooling) |
| Fall | 7 to 24 ft | midday & dawn | Main-lake point (8 ft) | Small blade bait, Jigging spoon |
| Winter | 7 to 24 ft | midday | Deep basin (20 ft) | Jigging spoon, Blade bait (vertical) |
Spring crappie on Lake Wisconsin hold shallow, usually 2 to 8 ft. They move out to 7 to 24 ft in summer and finish the year down in 7 to 24 ft. Put Old creek channel first on the milk run — a creek channel near 12 ft that grades prime for fall. The feeding windows run early morning and the evening. The summer box starts with a jig trolled/spider-rigged or a small crankbait (trolled).
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 8 ft | midday & dawn | Shallow bay flat (3 ft) | 1/16 oz jig + tube, Curly-tail grub |
| Summer | 7 to 24 ft | dawn & dusk | Old creek channel (12 ft) | Jig trolled/spider-rigged, Small crankbait (trolled) |
| Fall | 8 to 20 ft | dawn | Old creek channel (12 ft) | Jig + minnow combo, Small swimbait (1.5-2") |
| Winter | 7 to 24 ft | midday | Deep basin (20 ft) | Tungsten jig + soft plastic, Tiny jigging spoon |
Spring bluegill on Lake Wisconsin hold shallow, usually 1 to 6 ft. By summer they slide out to 4 to 15 ft, and by winter most fish are in 7 to 24 ft. The chart's best answer is Shallow bay flat — weed flat, 3 ft, prime for spring. Prime time lands in early morning and the evening. The summer box starts with a small sponge spider (fly) or a micro tube jig.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 1 to 6 ft | midday & dusk | Shallow bay flat (3 ft) | 1/32 oz jig + micro plastic, Tiny popper (evenings) |
| Summer | 4 to 15 ft | dawn & dusk | Weed flat (6 ft) | Small sponge spider (fly), Micro tube jig |
| Fall | 6 to 18 ft | midday | Weed flat (6 ft) | Micro jig + waxworm, Small spoon tipped |
| Winter | 7 to 24 ft | midday | Deep basin (20 ft) | Tungsten ice jig + plastic, Tiny spoon |
Spring smallmouth bass on Lake Wisconsin hold shallow, usually 3 to 12 ft. They move out to 7 to 24 ft in summer and finish the year down in 7 to 24 ft. Put Main-lake point first on the milk run — a point near 8 ft that grades prime for fall. The feeding windows run early morning and the evening. The summer box starts with a drop shot (goby/minnow) or a ned rig.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 12 ft | dawn & dusk | Gravel shoal (3 ft) | Ned rig, Tube jig |
| Summer | 7 to 24 ft | dawn & dusk | Break off the point (11 ft) | Drop shot (goby/minnow), Ned rig |
| Fall | 7 to 24 ft | midday & dawn | Main-lake point (8 ft) | Jerkbait, Blade bait |
| Winter | 7 to 24 ft | midday | Break off the point (11 ft) | Blade bait, Hair jig |
Lake Wisconsin also holds largemouth bass (8 to 20 ft in summer), channel catfish (7 to 24 ft in summer), flathead catfish (6 to 24 ft in summer), freshwater drum (6 to 24 ft in summer), common carp (3 to 15 ft in summer), longnose gar (1 to 12 ft in summer). Pick any of them on the map above for rated spots and bait picks.
The chart marks 18 structure features on Lake Wisconsin; the deepest is Deep basin at about 20 ft.
Access data: Wisconsin DNR — Boat Access Sites. Confirm conditions and fees locally before you launch.
Season dates, license requirements, and size and bag limits for Wisconsin waters are set by the Wisconsin DNR — and special regulations can apply to Lake Wisconsin specifically, so confirm the current rules before you fish.
Check the official Wisconsin fishing regulations →
Lake Wisconsin is about 24 ft (7 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 walleye, sauger, white bass & hybrids, crappie, bluegill, smallmouth bass, largemouth bass, channel catfish, flathead catfish, freshwater drum, common carp, longnose gar on Lake Wisconsin.
Spring Creek inflow is the top-rated area: an inflow / creek mouth in about 4 ft of water that rates prime for walleye in spring. The map above holds the full rated-spot list for every species and season.
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.
Fishing on Lake Wisconsin is regulated by the Wisconsin DNR. Check the official Wisconsin regulations for current license requirements, season dates, and size and bag limits — special regulations can apply to this specific water.
Lantz Pond 5 mi · Crystal Lake 6 mi · Devils Lake 7 mi · Fish Lake 7 mi · Mud Lake 7 mi · Lake Columbia 11 mi · Brandenburg Lake 13 mi · Goose Lake 13 mi · Seeley Lake 13 mi · Silver Lake 14 mi · Wisconsin River (Dells) 14 mi · Lake George 15 mi
See how Lake Wisconsin stacks up: best largemouth bass lakes in Wisconsin · best smallmouth bass lakes in Wisconsin · best walleye lakes in Wisconsin · best sauger lakes in Wisconsin
More water nearby: Sauk County fishing maps (17 charts). Browse all Wisconsin 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.