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78-acre lake in Thunder Bay District, Ontario. The lake tops out around 40 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 79 acres wrapped in 4 miles of bank, with a single island in the mix. The 3.2 development index tells the story — a convoluted bank whose fishable edge far outruns the acreage. About 65% of the surface sits shallower than 15 ft — that's the weed-and-bait zone. Figure 1.4 mi of water from one end to the other, 0.4 mi at the beam. It sits in Thunder Bay District. Its nearest charted neighbour, Question Mark Lake, is 1 mi to the northwest.
Spring brook trout on Bisect Lake hold shallow, usually 2 to 15 ft. By summer they slide out to 10 to 30 ft, and by winter most fish are in 3 to 20 ft. The chart's best answer is Main-lake point — point, 10 ft, prime for spring. Prime time lands in early morning and the evening. The summer box starts with a small spoon fished deep or a trolled lake-clear wobbler + worm.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 15 ft | dawn & dusk | Main-lake point (10 ft) | Small inline spinner (gold), Tiny spoon |
| Summer | 10 to 30 ft | dawn & dusk | Break off the point (7 ft) | Small spoon fished deep, Trolled lake-clear wobbler + worm |
| Fall | 2 to 15 ft | midday & dawn | Main-lake point (10 ft) | Small spoon (orange), Spinner |
| Winter | 3 to 20 ft | dawn | Break off the point (7 ft) | Small jigging spoon, Tungsten jig + plastic |
6 pieces of structure are mapped here — Deep basin, around 37 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 Bisect Lake specifically, so confirm the current rules before you fish.
Check the official Ontario fishing regulations →
Bisect Lake is about 40 ft (12 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 Bisect Lake.
Main-lake point is the top-rated area: a point in about 10 ft of water that rates prime for brook trout in spring. Open the map above to see every rated 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 Bisect 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.
Question Mark Lake 1 mi · Upper Hunters Lake 1 mi · Wideman Lake 1 mi · Elbow Lake 1 mi · Moose Lake 2 mi · Hunters Lakes 2 mi · Tartan Lake 2 mi · Mackenzie Lake 2 mi · Lost Lake 2 mi · Nalla Lake 3 mi · Long Lake 3 mi · Clegge Lake 3 mi
See how Bisect 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.