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1,125-acre lake near Mahnomen County. The lake tops out around 25 ft. The depth data here comes from the Minnesota DNR survey of 1976, a decades-old survey (the DNR's original lake-survey map). Here is how the season plays out for each species, straight from the data behind the map.
The drawn water covers 1,125 acres wrapped in 5.1 miles of bank. Nearly circular (index 1.1), so the story is the bottom, not the bank. The shallow band under 15 ft claims about 65% of the surface — that's where the groceries are. Figure 1.8 mi of water from one end to the other, 1.3 mi at the beam. Mahnomen County claims this one. If the bite dies, North Twin is 2 mi to the north.
In spring, cisco (lake herring) run shallow here, mostly 6 to 25 ft. Summer keeps them at 8 to 25 ft, and they winter in 8 to 25 ft. Spring cisco (lake herring) concentrate at Deep basin, a prime-rated deep basin around 25 ft. Fish it in early morning and you'll meet the bite. You won't need more than a vertical flutter spoon (small) or a drop-shot micro plastic most summer days.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 6 to 25 ft | dawn & dusk | Deep basin (25 ft) | Small silver spoon, Tiny swim jig (white) |
| Summer | 8 to 25 ft | dawn | Deep basin (25 ft) | Vertical flutter spoon (small), Drop-shot micro plastic |
| Fall | 5 to 25 ft | dusk & dawn | Break off the point (12 ft) | Small casting spoon, Inline spinner (silver) |
| Winter | 8 to 25 ft | dawn | Deep basin (25 ft) | Small jigging spoon (glow/silver), Tungsten jig + minnow head |
The spring pattern is a shallow one: walleye in 4 to 15 ft. As the season builds they drop to 8 to 25 ft, wintering in 8 to 25 ft. Top water on the chart: Break off the point, a drop-off in the 12 ft range, prime in fall. Time it for the evening and early morning. Summer baits: a crawler harness on bottom bouncer or a deep crankbait (trolled) gets it done.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 4 to 15 ft | dusk & dawn | Break off the point (12 ft) | 1/8 oz jig + minnow, Hair jig |
| Summer | 8 to 25 ft | dusk & dawn | Break off the point (12 ft) | Crawler harness on bottom bouncer, Deep crankbait (trolled) |
| Fall | 8 to 25 ft | dusk & night | Break off the point (12 ft) | Jigging rap, Jig + big minnow |
| Winter | 8 to 25 ft | dusk & dawn | Deep basin (25 ft) | Jigging spoon + minnow head, Rattle bait |
In spring, yellow perch run shallow here, mostly 3 to 12 ft. Summer pushes them deeper, 8 to 25 ft, and winter fish settle into 8 to 25 ft. Deep basin is the standout, a deep basin at roughly 25 ft, rated prime for fall yellow perch. Time it for early morning. You won't need more than a drop-shot micro plastics or a small spoon tipped with worm most summer days.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 12 ft | midday & dawn | Shallow bay flat (1 ft) | Small jig + curly tail, Perch-pattern micro crank |
| Summer | 8 to 25 ft | dawn | Deep basin (25 ft) | Drop-shot micro plastics, Small spoon tipped with worm |
| Fall | 8 to 25 ft | midday | Deep basin (25 ft) | Jigging spoon (small), Perch rig / spreader |
| Winter | 8 to 25 ft | midday & dawn | Deep basin (25 ft) | Tungsten jig + spikes, Rattle spoon (small) |
Early season northern pike use the shallows, holding in 2 to 8 ft. Expect a summer slide to 8 to 20 ft, then a winter hold in 5 to 15 ft. Put Break off the point first on the milk run — a drop-off near 12 ft that grades prime for fall. In summer the feeding windows fall in early morning and the evening. Tie on a bucktail or a weedless spoon over cabbage and you're in the game.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 8 ft | midday & dawn | Shallow bay flat (1 ft) | #5 inline spinner, Spoon (red/white) |
| Summer | 8 to 20 ft | dawn & dusk | Break off the point (12 ft) | Bucktail, Weedless spoon over cabbage |
| Fall | 6 to 18 ft | midday & dawn | Break off the point (12 ft) | Big rubber (Bull Dawg style), Husky-style jerkbait |
| Winter | 5 to 15 ft | midday | Break off the point (12 ft) | Tip-ups, Large jigging spoon |
Spring largemouth bass on South Twin hold shallow, usually 2 to 10 ft. By summer they slide out to 8 to 20 ft, and by winter most fish are in 8 to 25 ft. The chart's best answer is Break off the point — drop-off, 12 ft, prime for winter. Prime time lands in early morning and the evening. The summer box starts with a texas-rigged 10" worm or a deep-diving crankbait.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 10 ft | dawn & dusk | Shallow bay flat (1 ft) | Spinnerbait, Chatterbait |
| Summer | 8 to 20 ft | dawn & dusk | Break off the point (12 ft) | Texas-rigged 10" worm, Deep-diving crankbait |
| Fall | 4 to 15 ft | midday & dawn | Main-lake point (1 ft) | Squarebill crankbait (shad), Spinnerbait |
| Winter | 8 to 25 ft | midday | Break off the point (12 ft) | Blade bait, Jigging spoon |
In spring, rock bass run shallow here, mostly 2 to 10 ft. Midsummer fish sit out in 5 to 20 ft before dropping to 8 to 25 ft for winter. Fall rock bass concentrate at Break off the point, a prime-rated drop-off around 12 ft. Fish it in the evening and you'll meet the bite. You won't need more than a ned rig (small) or a marabou jig most summer days.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 10 ft | midday & dawn | Main-lake point (1 ft) | 1/16 oz jig + grub, Small inline spinner |
| Summer | 5 to 20 ft | dusk | Break off the point (12 ft) | Ned rig (small), Marabou jig |
| Fall | 8 to 22 ft | midday | Break off the point (12 ft) | Small tube jig, Inline spinner |
| Winter | 8 to 25 ft | midday | Deep basin (25 ft) | Tungsten jig + plastic, Small spoon + spike |
South Twin also holds crappie (10 to 25 ft in summer), bluegill (4 to 15 ft in summer), pumpkinseed (2 to 10 ft in summer), brown bullhead (3 to 12 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 25 ft.
Access data: MN DNR Water Access Sites (struc_water_access_sites), Minnesota Geospatial Commons. Confirm conditions and fees locally before you launch.
| Date | Species | Count | Size |
|---|---|---|---|
| 2025* | Walleye (adults) | 23 | — |
| 2025* | Walleye (fingerlings) | 2,800 | — |
| 2025* | Walleye (yearlings) | 449 | — |
| 2025* | Walleye (fingerlings) | 2,484 | — |
| 2024* | Walleye (fingerlings) | 1,848 | — |
* Approximate date (agency reports month or season only). Source: Minnesota DNR LakeFinder stocking reports, retrieved 2026-08-18.
Season dates, license requirements, and size and bag limits for Minnesota waters are set by the Minnesota DNR — and special regulations can apply to South Twin specifically, so confirm the current rules before you fish.
Check the official Minnesota fishing regulations →
South Twin is about 25 ft (8 m) deep at its deepest point. The depth data here comes from the Minnesota DNR survey of 1976, a decades-old survey (the DNR's original lake-survey map).
Anglers target cisco (lake herring), walleye, yellow perch, northern pike, largemouth bass, rock bass, crappie, bluegill, pumpkinseed, brown bullhead on South Twin.
Deep basin is the top-rated area: a deep basin in about 25 ft of water that rates prime for cisco (lake herring) in spring. Scroll up to the map for the complete spot list by species and season.
For cisco (lake herring), 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.
Yes — per Minnesota DNR LakeFinder stocking reports records, South Twin was most recently stocked 2025 with 23 walleye (adults). The full stocking history is listed above.
Fishing on South Twin is regulated by the Minnesota DNR. Check the official Minnesota regulations for current license requirements, season dates, and size and bag limits — special regulations can apply to this specific water.
North Twin 2 mi · Snider 3 mi · Bass 3 mi · Sargent 3 mi · Little Elbow 4 mi · Wadena 4 mi · Buresh 4 mi · McCraney 5 mi · Tulaby 6 mi · Little Bass 6 mi · Evey 7 mi · Lower Camp 7 mi
See how South Twin stacks up: best largemouth bass lakes in Minnesota · best walleye lakes in Minnesota · best northern pike lakes in Minnesota · best crappie lakes in Minnesota
More water nearby: Mahnomen County fishing maps (14 charts). Browse all Minnesota fishing maps or see every water on DepthScout. Bathymetry credit: state fisheries survey programs. 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.