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206-acre lake in Algoma District, Ontario. The lake tops out around 70 ft. The depth data here comes from the Ontario MNRF survey of 1969, a decades-old survey (a transect sounding survey). Every species below gets its seasonal read from the same numbers driving the chart.
Drawn out, this is 207 acres of water rimmed by 9 miles of bank, broken up by 3 islands. That shoreline is heavily fingered (development index 4.5) — bays, points and pockets everywhere, which multiplies the fishable edge. About 31% of the surface sits shallower than 15 ft — that's the weed-and-bait zone. Tip to tip the water measures near 2 mi with a 1-mi widest point. The water lies in Algoma District. For a second option, Maquire L. lies 1 mi southeast.
Spring puts lake trout in skinny water — 10 to 40 ft is the zone. As the season builds they drop to 21 to 70 ft, wintering in 18 to 70 ft. Summer lake trout concentrate at Deep basin, a prime-rated deep basin around 70 ft. Warm-month bites cluster around early morning. A white tube jig (deep) or a magnum spoon on downrigger covers the summer program.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 10 to 40 ft | dawn & dusk | Secondary point (17 ft) | Casting spoon over shoals, Jerkbait (shallow) |
| Summer | 21 to 70 ft | dawn | Deep basin (70 ft) | White tube jig (deep), Magnum spoon on downrigger |
| Fall | 10 to 50 ft | dusk & dawn | Secondary point (17 ft) | Heavy casting spoon, Jigging rap over reefs |
| Winter | 18 to 70 ft | dawn | Deep basin (70 ft) | White tube jig, Airplane jig |
6 pieces of structure are mapped here — Deep basin, around 70 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 Finn Lake specifically, so confirm the current rules before you fish.
Check the official Ontario fishing regulations →
Finn Lake is about 70 ft (21 m) deep at its deepest point. The depth data here comes from the Ontario MNRF survey of 1969, a decades-old survey (a transect sounding survey).
Anglers target lake trout on Finn Lake.
Deep basin is the top-rated area: a deep basin in about 70 ft of water that rates prime for lake trout in summer. The interactive chart above rates every spot for each species and season.
For lake trout, 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 Finn 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.
Maquire L. 1 mi · Hyslop Lake 1 mi · Town Line Lake 2 mi · Toodee Lake 2 mi · Skating Logger Lake 2 mi · Rainy Lake 3 mi · Robb Lake 3 mi · Spot Lake 3 mi · Ed Frazer Lake 3 mi · White Bear Lake 3 mi · Smoky Lake 3 mi · John Run L. 3 mi
See how Finn Lake stacks up: best lake trout lakes in Ontario
More water nearby: Algoma District fishing maps (1026 charts). Browse all Ontario 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.