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110-acre lake in Thunder Bay District, Ontario. The lake tops out around 236 ft. The depth data here comes from a transect sounding survey by the Ontario MNRF. Every species below gets its seasonal read from the same numbers driving the chart.
The drawn water covers 110 acres wrapped in 4.1 miles of bank, broken up by an island. A development index of 2.8 means a maze of bays and points: far more casting targets than a round bowl of the same size. About 20% of the surface sits shallower than 15 ft — that's the weed-and-bait zone. Call it 1.4 mi long by 0.5 mi wide at the broadest reach. Thunder Bay District claims this one. Bluff Lake sits 2 mi north — the closest neighbouring chart.
When the water first warms, brook trout slide up into 2 to 15 ft. Summer is a 10 to 30 ft game here, winter a 3 to 20 ft one. Start at Secondary point. It's a point holding about 8 ft of water and rates prime come spring. The feeding windows run early morning and the evening. Keep a small spoon fished deep or a trolled lake-clear wobbler + worm rigged through the warm months.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 15 ft | dawn & dusk | Secondary point (8 ft) | Small inline spinner (gold), Tiny spoon |
| Summer | 10 to 30 ft | dawn & dusk | open water | Small spoon fished deep, Trolled lake-clear wobbler + worm |
| Fall | 2 to 15 ft | midday & dawn | Secondary point (8 ft) | Small spoon (orange), Spinner |
| Winter | 3 to 20 ft | dawn | Shallow bay flat (10 ft) | Small jigging spoon, Tungsten jig + plastic |
Deep Lake carries 7 mapped structure features, topping out (or rather bottoming out) at Deep basin, about 232 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 Deep Lake specifically, so confirm the current rules before you fish.
Check the official Ontario fishing regulations →
Deep Lake is about 236 ft (72 m) deep at its deepest point. The depth data here comes from a transect sounding survey by the Ontario MNRF.
Anglers target brook trout on Deep Lake.
Secondary point is the top-rated area: a point in about 8 ft of water that rates prime for brook trout in spring. The interactive chart above rates every spot for each species and season.
For brook trout, the summer bite is best in early morning and the evening. Each species page section below lists the seasonal windows, and the map shows a live NOW badge when you're inside one.
Fishing on Deep 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.
Bluff Lake 2 mi · Crosman Lake 2 mi · Big Duck Lake 5 mi · Ambrose Lake 5 mi · Ducell Lake 5 mi · Davidson Lake 5 mi · Found Lake 7 mi · Craig Lake 8 mi · Antler Lake 9 mi · Bews Lake 10 mi · Chapman Lake 10 mi · Sister Lakes 12 mi
See how Deep Lake stacks up: best brook trout lakes in Ontario
More water nearby: Thunder Bay District fishing maps (662 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.