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274-acre lake in Algoma District, Ontario. The lake tops out around 79 ft. The depth data here comes from the Ontario MNRF survey of 1978, a decades-old survey (a transect sounding survey). Below is the species-by-species picture, pulled from the same data the map uses.
The drawn water covers 275 acres wrapped in 6.5 miles of bank — 3 islands included. With a shoreline index of 2.8, this water is all arms and coves — edge habitat well beyond its acreage. Roughly 45% of the water is 15 ft or less, the band where the food chain lives. The basin spans about 1.9 mi end to end and 0.8 mi across at its widest. It sits in Algoma District. Its nearest charted neighbour, Pandion L., is 2 mi to the south.
Spring lake trout on Boumage Lake hold shallow, usually 10 to 40 ft. By summer they slide out to 24 to 79 ft, and by winter most fish are in 20 to 79 ft. The chart's best answer is Deep basin — deep basin, 78 ft, prime for summer. Prime time lands in early morning. The summer box starts with a white tube jig (deep) or a magnum spoon on downrigger.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 10 to 40 ft | dawn & dusk | Break off the point (14 ft) | Casting spoon over shoals, Jerkbait (shallow) |
| Summer | 24 to 79 ft | dawn | Deep basin (78 ft) | White tube jig (deep), Magnum spoon on downrigger |
| Fall | 10 to 50 ft | dusk & dawn | Break off the point (14 ft) | Heavy casting spoon, Jigging rap over reefs |
| Winter | 20 to 79 ft | dawn | Deep basin (78 ft) | White tube jig, Airplane jig |
In spring, lake whitefish run shallow here, mostly 15 to 45 ft. Summer pushes them deeper, 24 to 79 ft, and winter fish settle into 25 to 70 ft. Deep basin is the standout, a deep basin at roughly 78 ft, rated prime for summer lake whitefish. Time it for early morning. You won't need more than a blade bait vertical or a small jigging spoon most summer days.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 15 to 45 ft | midday & dawn | Break off the point (14 ft) | Small jig + waxworm, Blade bait (small) |
| Summer | 24 to 79 ft | dawn | Deep basin (78 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 | 25 to 70 ft | midday & dawn | Deep basin (78 ft) | Jigging spoon + bead chain, Tungsten jig + waxie |
Count 6 structure marks on this chart. The deepest, Deep basin, sits near 78 ft.
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 Boumage Lake specifically, so confirm the current rules before you fish.
Check the official Ontario fishing regulations →
Boumage Lake is about 79 ft (24 m) deep at its deepest point. The depth data here comes from the Ontario MNRF survey of 1978, a decades-old survey (a transect sounding survey).
Anglers target lake trout, lake whitefish on Boumage Lake.
Deep basin is the top-rated area: a deep basin in about 78 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 Boumage 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.
Pandion L. 2 mi · Bark Lake 4 mi · Big Trout L. 4 mi · Five Star Lake 5 mi · Little Trout Lake 5 mi · Little Touch L. 5 mi · Red Elk Lake 5 mi · Frying Pan Lake 6 mi · Lidstone Lake 6 mi · Foucault L. 42 6 mi · Navy Lake 7 mi · Poupore Lake 7 mi
See how Boumage Lake stacks up: best lake trout lakes in Ontario · best lake whitefish 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.