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347-acre lake in Sudbury District, Ontario. The lake tops out around 32 ft. What you see is a modeled chart: the shoreline is real, the max depth is published, and the contours between are estimated. Plan with it; don't navigate by it. What the data behind the map says about each species, season by season:
Traced from the shoreline, Alcorn Lake runs 346 acres with 7.5 miles of edge. That shoreline is heavily fingered (development index 2.9) — bays, points and pockets everywhere, which multiplies the fishable edge. Roughly 79% of the water is 15 ft or less as modeled, the band where the food chain lives. Tip to tip the water measures near 2.3 mi with a 0.8-mi widest point. The water lies in Sudbury District. The nearest mapped water is Frog Lake, 7 mi to the north.
Early season lake whitefish use the shallows, holding in 10 to 32 ft. Even in summer they hold at 10 to 32 ft; winter keeps them in 10 to 32 ft. Put Deep basin first on the milk run — a deep basin near 27 ft that grades prime for summer. In summer the feeding windows fall in early morning. Tie on a blade bait vertical or a small jigging spoon and you're in the game.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 10 to 32 ft | midday & dawn | Break off the point (14 ft) | Small jig + waxworm, Blade bait (small) |
| Summer | 10 to 32 ft | dawn | Deep basin (27 ft) | Blade bait vertical, Small jigging spoon |
| Fall | 8 to 30 ft | dusk | Break off the point (14 ft) | Small spoon (gold), Jig + plastic larva |
| Winter | 10 to 32 ft | midday & dawn | Deep basin (27 ft) | Jigging spoon + bead chain, Tungsten jig + waxie |
Early season cisco (lake herring) use the shallows, holding in 8 to 32 ft. Even in summer they hold at 10 to 32 ft; winter keeps them in 10 to 32 ft. Put Deep basin first on the milk run — a deep basin near 27 ft that grades prime for spring. In summer the feeding windows fall in early morning. Tie on a vertical flutter spoon (small) or a drop-shot micro plastic and you're in the game.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 8 to 32 ft | dawn & dusk | Deep basin (27 ft) | Small silver spoon, Tiny swim jig (white) |
| Summer | 10 to 32 ft | dawn | Deep basin (27 ft) | Vertical flutter spoon (small), Drop-shot micro plastic |
| Fall | 5 to 25 ft | dusk & dawn | Break off the point (14 ft) | Small casting spoon, Inline spinner (silver) |
| Winter | 10 to 32 ft | dawn | Deep basin (27 ft) | Small jigging spoon (glow/silver), Tungsten jig + minnow head |
Come spring, look for walleye tight to the bank in 4 to 15 ft. They move out to 10 to 32 ft in summer and finish the year down in 10 to 32 ft. If you only fish one area, make it Break off the point: a drop-off around 14 ft that scores prime in fall. Best bite is the evening and early morning. A crawler harness on bottom bouncer or a deep crankbait (trolled) is the honest summer answer here.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 4 to 15 ft | dusk & dawn | Main-lake point (8 ft) | 1/8 oz jig + minnow, Hair jig |
| Summer | 10 to 32 ft | dusk & dawn | Break off the point (14 ft) | Crawler harness on bottom bouncer, Deep crankbait (trolled) |
| Fall | 10 to 32 ft | dusk & night | Break off the point (14 ft) | Jigging rap, Jig + big minnow |
| Winter | 10 to 32 ft | dusk & dawn | Deep basin (27 ft) | Jigging spoon + minnow head, Rattle bait |
Start shallow in spring: northern pike sit in 2 to 8 ft that time of year. Summer pushes them deeper, 8 to 20 ft, and winter fish settle into 5 to 15 ft. The spot to know is Shallow bay flat, a weed flat in about 4 ft of water that rates prime for northern pike in spring. Warm-month bites cluster around early morning and the evening. Throw a bucktail or a weedless spoon over cabbage until the fish tell you otherwise.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 8 ft | midday & dawn | Shallow bay flat (4 ft) | #5 inline spinner, Spoon (red/white) |
| Summer | 8 to 20 ft | dawn & dusk | Break off the point (14 ft) | Bucktail, Weedless spoon over cabbage |
| Fall | 6 to 18 ft | midday & dawn | Break off the point (14 ft) | Big rubber (Bull Dawg style), Husky-style jerkbait |
| Winter | 5 to 15 ft | midday | Shallow bay flat (4 ft) | Tip-ups, Large jigging spoon |
6 pieces of structure are mapped here — Deep basin, around 27 ft, is the deepest of them.
Season dates, license requirements, and size and bag limits for Ontario waters are set by the Ontario fishing regulations (FMZ summary) — and special regulations can apply to Alcorn Lake specifically, so confirm the current rules before you fish.
Check the official Ontario fishing regulations →
Alcorn Lake is about 32 ft (10 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 lake whitefish, cisco (lake herring), walleye, northern pike on Alcorn Lake.
Deep basin is the top-rated area: a deep basin in about 27 ft of water that rates prime for lake whitefish in summer. The map above holds the full rated-spot list for every species and season.
For lake whitefish, 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.
Fishing on Alcorn Lake is regulated by the Ontario fishing regulations (FMZ summary). Check the official Ontario regulations for current license requirements, season dates, and size and bag limits — special regulations can apply to this specific water.
Frog Lake 7 mi · Renée Lake 8 mi · Perching Lake 8 mi · Nemegosenda Lake 9 mi · Robson Lake 10 mi · Schewabik Lake 10 mi · Oscar Lake 12 mi · Copperfield Lake 12 mi · Lincoln L. 642448 12 mi · Harold Lake 13 mi · Yoyo Lake 14 mi · Mate Lakes 14 mi
See how Alcorn Lake stacks up: best walleye lakes in Ontario · best northern pike lakes in Ontario · best lake whitefish lakes in Ontario · best cisco (lake herring) lakes in Ontario
More water nearby: Sudbury District fishing maps (868 charts). Browse all Ontario 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.