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97-acre lake in Sudbury District, Ontario. The lake tops out around 39 ft. The depth data here comes from the Ontario MNRF survey of 1983 (a transect sounding survey). The rest of this page walks each species through its year, using the map's own scoring.
The drawn water covers 97 acres wrapped in 2.1 miles of bank. A middling shoreline index (1.5) gives it some bays to work without being a maze. Roughly 59% of the water is 15 ft or less, the band where the food chain lives. Figure 0.8 mi of water from one end to the other, 0.4 mi at the beam. It sits in Sudbury District. Sawbill Lake sits 5 mi northeast — the closest neighbouring chart.
In spring, lake whitefish run shallow here, mostly 12 to 39 ft. Summer keeps them at 12 to 39 ft, and they winter in 12 to 39 ft. Deep basin is the standout, a deep basin at roughly 38 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 | 12 to 39 ft | midday & dawn | Break off the point (30 ft) | Small jig + waxworm, Blade bait (small) |
| Summer | 12 to 39 ft | dawn | Deep basin (38 ft) | Blade bait vertical, Small jigging spoon |
| Fall | 8 to 30 ft | dusk | Break off the point (30 ft) | Small spoon (gold), Jig + plastic larva |
| Winter | 12 to 39 ft | midday & dawn | Deep basin (38 ft) | Jigging spoon + bead chain, Tungsten jig + waxie |
The spring pattern is a shallow one: walleye in 4 to 15 ft. Midsummer fish sit out in 15 to 35 ft before dropping to 12 to 39 ft for winter. The spot to know is Break off the point, a drop-off in about 30 ft of water that rates prime for walleye in fall. Plan around the evening and early morning in the warm months. 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 | Main-lake point (11 ft) | 1/8 oz jig + minnow, Hair jig |
| Summer | 15 to 35 ft | dusk & dawn | Break off the point (30 ft) | Crawler harness on bottom bouncer, Deep crankbait (trolled) |
| Fall | 12 to 39 ft | dusk & night | Break off the point (30 ft) | Jigging rap, Jig + big minnow |
| Winter | 12 to 39 ft | dusk & dawn | Deep basin (38 ft) | Jigging spoon + minnow head, Rattle bait |
Tooms Lake carries 6 mapped structure features, topping out (or rather bottoming out) at Deep basin, about 38 ft down.
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 Tooms Lake specifically, so confirm the current rules before you fish.
Check the official Ontario fishing regulations →
Tooms Lake is about 39 ft (12 m) deep at its deepest point. The depth data here comes from the Ontario MNRF survey of 1983 (a transect sounding survey).
Anglers target lake whitefish, walleye on Tooms Lake.
Deep basin is the top-rated area: a deep basin in about 38 ft of water that rates prime for lake whitefish in summer. The interactive chart above rates every spot for each 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 Tooms 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.
Sawbill Lake 5 mi · Elmer L. 5 mi · Betty Lake 5 mi · Tony Lake 6 mi · Hotstone Lake 8 mi · Flyline Lake 8 mi · Marylyn Lake 8 mi · Harvey L. 8 mi · Little Wenebegon Lake 8 mi · De Gaulle L. 16 8 mi · Nimitz L. 15 9 mi · Shunsby Lake 9 mi
See how Tooms Lake stacks up: best walleye lakes in Ontario · best lake whitefish lakes in Ontario
More water nearby: Sudbury District fishing maps (868 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.