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Rating depth structure for largemouth bass.
Shared by DepthScout anglers. Exact spots stay private, always.
1,875-acre lake in Randolph County, Illinois. The lake tops out around 48 ft. The depth picture is modeled, anchored to the true shoreline and the water's published max depth — a scouting aid, never a chart to run a boat by. What the data behind the map says about each species, season by season:
On the chart, Baldwin Lake draws 1,964 acres inside 15.6 miles of shoreline. With a shoreline index of 2.5, this water is all arms and coves — edge habitat well beyond its acreage. Roughly 74% of the water is 15 ft or less as modeled, the band where the food chain lives. The basin spans about 2.6 mi end to end and 2.3 mi across at its widest. You'll find it in Randolph County. Closest neighbour on DepthScout: Kaskaskia River, 25 mi northeast of here.
Spring blue catfish on Baldwin Lake hold shallow, usually 5 to 25 ft. By summer they slide out to 10 to 40 ft, and by winter most fish are in 14 to 48 ft. The chart's best answer is Deep basin — deep basin, 41 ft, prime for winter. Prime time lands in early morning and the evening.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 5 to 25 ft | dusk | Break off the point (22 ft) | |
| Summer | 10 to 40 ft | dawn & dusk | Deep basin (41 ft) | |
| Fall | 15 to 45 ft | dusk | Deep basin (41 ft) | |
| Winter | 14 to 48 ft | midday | Deep basin (41 ft) |
Spring puts bluegill in skinny water — 1 to 6 ft is the zone. Warm water sends them out to 4 to 15 ft; cold water stacks them in 10 to 25 ft. Shallow bay flat is the standout, a weed flat at roughly 6 ft, rated prime for spring bluegill. Plan around early morning and the evening in the warm months. A small sponge spider (fly) or a micro tube jig covers the summer program.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 1 to 6 ft | midday & dusk | Shallow bay flat (6 ft) | 1/32 oz jig + micro plastic, Tiny popper (evenings) |
| Summer | 4 to 15 ft | dawn & dusk | Shallow bay flat (6 ft) | Small sponge spider (fly), Micro tube jig |
| Fall | 6 to 18 ft | midday | Shallow bay flat (6 ft) | Micro jig + waxworm, Small spoon tipped |
| Winter | 10 to 25 ft | midday | Break off the point (22 ft) | Tungsten ice jig + plastic, Tiny spoon |
Start shallow in spring: channel catfish sit in 3 to 12 ft that time of year. Warm water sends them out to 8 to 25 ft; cold water stacks them in 20 to 40 ft. Top water on the chart: Deep basin, a deep basin in the 41 ft range, prime in winter. Fish it in after dark and the evening and you'll meet the bite.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 12 ft | dusk | Shallow bay flat (6 ft) | |
| Summer | 8 to 25 ft | night & dusk | Break off the point (22 ft) | |
| Fall | 10 to 30 ft | dusk | Break off the point (22 ft) | |
| Winter | 20 to 40 ft | midday | Deep basin (41 ft) |
The spring pattern is a shallow one: crappie in 2 to 8 ft. Midsummer fish sit out in 10 to 25 ft before dropping to 15 to 35 ft for winter. The spot to know is Shallow bay flat, a weed flat in about 6 ft of water that rates prime for crappie in spring. 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 | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 8 ft | midday & dawn | Shallow bay flat (6 ft) | 1/16 oz jig + tube, Curly-tail grub |
| Summer | 10 to 25 ft | dawn & dusk | Break off the point (22 ft) | Jig trolled/spider-rigged, Small crankbait (trolled) |
| Fall | 8 to 20 ft | dawn | Shallow bay flat (6 ft) | Jig + minnow combo, Small swimbait (1.5-2") |
| Winter | 15 to 35 ft | midday | Deep basin (41 ft) | Tungsten jig + soft plastic, Tiny jigging spoon |
In spring, flathead catfish run shallow here, mostly 5 to 20 ft. Midsummer fish sit out in 8 to 30 ft before dropping to 20 to 45 ft for winter. Winter flathead catfish concentrate at Deep basin, a prime-rated deep basin around 41 ft. Fish it in after dark and the evening and you'll meet the bite.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 5 to 20 ft | night & dusk | open water | |
| Summer | 8 to 30 ft | night & dusk | Break off the point (22 ft) | |
| Fall | 10 to 35 ft | night & dusk | Deep basin (41 ft) | |
| Winter | 20 to 45 ft | midday | Deep basin (41 ft) |
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 | Main-lake point (12 ft) | Texas-rigged 10" worm, Deep-diving crankbait |
| Fall | 4 to 15 ft | midday & dawn | Main-lake point (12 ft) | Squarebill crankbait (shad), Spinnerbait |
| Winter | 15 to 35 ft | midday | Break off the point (22 ft) | Blade bait, Jigging spoon |
Baldwin Lake also holds smallmouth bass (10 to 30 ft in summer), striped bass (14 to 48 ft in summer), white bass & hybrids (10 to 30 ft in summer). Pick any of them on the map above for rated spots and bait picks.
Count 6 structure marks on this chart. The deepest, Deep basin, sits near 41 ft.
Season dates, license requirements, and size and bag limits for Illinois waters are set by the Illinois DNR — and special regulations can apply to Baldwin Lake specifically, so confirm the current rules before you fish.
Check the official Illinois fishing regulations →
Baldwin Lake is about 48 ft (15 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 blue catfish, bluegill, channel catfish, crappie, flathead catfish, largemouth bass, smallmouth bass, striped bass, white bass & hybrids on Baldwin Lake.
Deep basin is the top-rated area: a deep basin in about 41 ft of water that rates prime for blue catfish in winter. The interactive chart above rates every spot for each species and season.
For blue catfish, 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.
Fishing on Baldwin Lake is regulated by the Illinois DNR. Check the official Illinois regulations for current license requirements, season dates, and size and bag limits — special regulations can apply to this specific water.
Kaskaskia River 25 mi · Washington County Lake 28 mi · Kinkaid Lake 36 mi · Lake Murphysboro 40 mi · Big River 41 mi, MO · Carlyle Lake 46 mi · Centralia Reservoir 48 mi · Creve Coeur Lake 48 mi, MO · Rend Lake 50 mi · Cedar Lake 52 mi · Lake Centralia 53 mi · Crab Orchard Lake 55 mi
See how Baldwin Lake stacks up: best largemouth bass lakes in Illinois · best smallmouth bass lakes in Illinois · best crappie lakes in Illinois · best bluegill lakes in Illinois
Browse all Illinois 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.