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7,346-acre flowage near Green Lake. Wisconsin’s deepest inland lake. Lake trout water. The lake tops out around 236 ft. The contours come from a model of the real basin shape and its known max depth. Read them as probabilities, not soundings, and keep them out of navigation decisions. Below is the species-by-species picture, pulled from the same data the map uses.
Traced from the shoreline, Big Green Lake runs 8,056 acres with 39.7 miles of edge. The 3.2 development index tells the story — a convoluted bank whose fishable edge far outruns the acreage. About 20% of the surface sits shallower than 15 ft on the modeled chart — that's the weed-and-bait zone. Call it 9.6 mi long by 3.2 mi wide at the broadest reach. You'll find it in Green Lake County. Closest neighbour on DepthScout: Twin Lakes, 1 mi southeast of here.
In spring, rainbow trout run shallow here, mostly 5 to 20 ft. Summer pushes them deeper, 8 to 30 ft, and winter fish settle into 8 to 40 ft. Shoreline point is the standout, a point at roughly 11 ft, rated prime for spring rainbow trout. Time it for early morning and the evening. 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 | Shoreline point (11 ft) | Inline spinner (silver), Small spoon |
| Summer | 8 to 30 ft | dawn & dusk | Rock reef (7 ft) | Dodger + spoon (deep troll), Flutter spoon |
| Fall | 10 to 35 ft | dawn & dusk | Shoreline point (11 ft) | Casting spoon, Jerkbait over shoals |
| Winter | 8 to 40 ft | dawn | Rock reef (7 ft) | Jigging spoon, Tube jig (white) |
When the water first warms, walleye slide up into 4 to 15 ft. By summer they slide out to 15 to 35 ft, and by winter most fish are in 20 to 40 ft. If you only fish one area, make it Offshore hump: an offshore hump around 30 ft that scores prime in summer. In summer the feeding windows fall in 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 | Rock reef (7 ft) | 1/8 oz jig + minnow, Hair jig |
| Summer | 15 to 35 ft | dusk & dawn | Offshore hump (30 ft) | Crawler harness on bottom bouncer, Deep crankbait (trolled) |
| Fall | 12 to 40 ft | dusk & night | Shoreline point (11 ft) | Jigging rap, Jig + big minnow |
| Winter | 20 to 40 ft | dusk & dawn | Offshore hump (30 ft) | Jigging spoon + minnow head, Rattle bait |
The spring pattern is a shallow one: smallmouth bass in 3 to 12 ft. Midsummer fish sit out in 10 to 30 ft before dropping to 20 to 45 ft for winter. The spot to know is Rock reef, a rock pile in about 7 ft of water that rates prime for smallmouth bass in spring. Plan around early morning and the evening in the warm months. Summer baits: a drop shot (goby/minnow) or a ned rig gets it done.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 12 ft | dawn & dusk | Rock reef (7 ft) | Ned rig, Tube jig |
| Summer | 10 to 30 ft | dawn & dusk | Offshore hump (30 ft) | Drop shot (goby/minnow), Ned rig |
| Fall | 8 to 25 ft | midday & dawn | Shoreline point (11 ft) | Jerkbait, Blade bait |
| Winter | 20 to 45 ft | midday | Offshore hump (30 ft) | Blade bait, Hair jig |
Start shallow in spring: largemouth bass sit in 2 to 10 ft that time of year. Warm water sends them out to 8 to 20 ft; cold water stacks them in 15 to 35 ft. Top water on the chart: Shallow bay flat, a weed flat in the 6 ft range, prime in spring. Fish it in early morning and the evening and you'll meet the bite. Throw a texas-rigged 10" worm or a deep-diving crankbait until the fish tell you otherwise.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 10 ft | dawn & dusk | Shallow bay flat (6 ft) | Spinnerbait, Chatterbait |
| Summer | 8 to 20 ft | dawn & dusk | Shoreline point (11 ft) | Texas-rigged 10" worm, Deep-diving crankbait |
| Fall | 4 to 15 ft | midday & dawn | Shoreline point (11 ft) | Squarebill crankbait (shad), Spinnerbait |
| Winter | 15 to 35 ft | midday | Offshore hump (30 ft) | Blade bait, Jigging spoon |
The spring pattern is a shallow one: white bass & hybrids in 3 to 15 ft. Midsummer fish sit out in 10 to 30 ft before dropping to 20 to 40 ft for winter. The spot to know is Shoreline point, a point in about 11 ft of water that rates prime for white bass & hybrids in fall. Plan around early morning and the evening in the warm months. Summer baits: a jigging spoon or a topwater (when schooling) gets it done.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 15 ft | midday & dawn | Shoreline point (11 ft) | Rooster tail / inline spinner, Curly-tail jig (white/chartreuse) |
| Summer | 10 to 30 ft | dawn & dusk | Offshore hump (30 ft) | Jigging spoon, Topwater (when schooling) |
| Fall | 8 to 25 ft | midday & dawn | Shoreline point (11 ft) | Small blade bait, Jigging spoon |
| Winter | 20 to 40 ft | midday | Offshore hump (30 ft) | Jigging spoon, Blade bait (vertical) |
When the water first warms, yellow perch slide up into 3 to 12 ft. Summer is a 10 to 30 ft game here, winter a 15 to 35 ft one. Start at Shallow bay flat. It's a weed flat holding about 6 ft of water and rates prime come spring. The feeding windows run early morning. Keep a drop-shot micro plastics or a small spoon tipped with worm rigged through the warm months.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 12 ft | midday & dawn | Shallow bay flat (6 ft) | Small jig + curly tail, Perch-pattern micro crank |
| Summer | 10 to 30 ft | dawn | Offshore hump (30 ft) | Drop-shot micro plastics, Small spoon tipped with worm |
| Fall | 12 to 35 ft | midday | Offshore hump (30 ft) | Jigging spoon (small), Perch rig / spreader |
| Winter | 15 to 35 ft | midday & dawn | Offshore hump (30 ft) | Tungsten jig + spikes, Rattle spoon (small) |
Big Green Lake also holds crappie (10 to 25 ft in summer), bluegill (4 to 15 ft in summer), lake trout (50 to 120 ft in summer), brown trout (25 to 60 ft in summer). Pick any of them on the map above for rated spots and bait picks.
21 pieces of structure are mapped here — Deep basin, around 201 ft, is the deepest of them.
Access data: Wisconsin DNR — Boat Access Sites. Confirm conditions and fees locally before you launch.
| Date | Species | Count | Size |
|---|---|---|---|
| 2025* | Brown Trout (large fingerling) | 13,998 | ~4.4" |
| 2025* | Lake Trout (yearling) | 28,378 | ~6.5" |
| 2025* | Walleye (fry) | 6,912,000 | ~0.5" |
| 2025* | Muskellunge (large fingerling) | 2,499 | ~10.7" |
| 2024* | Lake Trout (yearling) | 24,379 | ~7.7" |
| 2024* | Brown Trout (large fingerling) | 15,000 | ~4.8" |
| 2024* | Walleye (fry) | 7,447,000 | ~0.5" |
* Approximate date (agency reports month or season only). Source: Wisconsin DNR fish-stocking summary, retrieved 2026-08-18.
Season dates, license requirements, and size and bag limits for Wisconsin waters are set by the Wisconsin DNR — and special regulations can apply to Big Green Lake specifically, so confirm the current rules before you fish.
Check the official Wisconsin fishing regulations →
Big Green Lake is about 236 ft (72 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 rainbow trout, walleye, smallmouth bass, largemouth bass, white bass & hybrids, yellow perch, crappie, bluegill, lake trout, brown trout on Big Green Lake.
Offshore hump is the top-rated area: an offshore hump in about 30 ft of water that rates prime for walleye in summer. Every other rated spot, per species and season, is on the map above.
For rainbow trout, the summer bite is best in early morning 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.
Yes — per Wisconsin DNR fish-stocking summary records, Big Green Lake was most recently stocked 2025 with 13,998 brown trout (large fingerling). The full stocking history is listed above.
Fishing on Big Green Lake 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.
Twin Lakes 1 mi · Little Twin Lake 1 mi · Spring Lake 1 mi · Puchyan Millpond 4 mi · Little Green Lake 5 mi · Fairwater Pond 7 mi · Ripon Pond (Gothic) 8 mi · Lake Puckaway 9 mi · Grand Lake (Millpond) 10 mi · Lake Maria 11 mi · Spring Lake 12 mi · Lake Emily 12 mi
See how Big Green Lake stacks up: best largemouth bass lakes in Wisconsin · best smallmouth bass lakes in Wisconsin · best walleye lakes in Wisconsin · best crappie lakes in Wisconsin
More water nearby: Green Lake County fishing maps (11 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.