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25-acre lake in Algoma District, Ontario. The lake tops out around 60 ft. The depth data here comes from the Ontario MNRF survey of 2016 (a transect sounding survey). Below is the species-by-species picture, pulled from the same data the map uses.
Drawn out, this is 25 acres of water rimmed by 0.9 miles of bank. Its 1.3 shoreline index means few bank features; the contours below do the pattern work. 10% of the surface is littoral (under ~15 ft) — cover, weeds and forage water. Tip to tip the water measures near 0.4 mi with a 0.2-mi widest point. The water lies in Algoma District. For a second option, Speckle Lake lies 2 mi west.
In spring, brook trout run shallow here, mostly 2 to 15 ft. Midsummer fish sit out in 10 to 30 ft before dropping to 3 to 20 ft for winter. Spring brook trout concentrate at Main-lake point, a good-rated point around 18 ft. Fish it in early morning and the evening and you'll meet the bite. You won't need more than a small spoon fished deep or a trolled lake-clear wobbler + worm most summer days.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 15 ft | dawn & dusk | Main-lake point (18 ft) | Small inline spinner (gold), Tiny spoon |
| Summer | 10 to 30 ft | dawn & dusk | Break off the point (39 ft) | Small spoon fished deep, Trolled lake-clear wobbler + worm |
| Fall | 2 to 15 ft | midday & dawn | Main-lake point (18 ft) | Small spoon (orange), Spinner |
| Winter | 3 to 20 ft | dawn | open water | Small jigging spoon, Tungsten jig + plastic |
Triangle Lake carries 4 mapped structure features, topping out (or rather bottoming out) at Deep basin, about 57 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 Triangle Lake specifically, so confirm the current rules before you fish.
Check the official Ontario fishing regulations →
Triangle Lake is about 60 ft (18 m) deep at its deepest point. The depth data here comes from the Ontario MNRF survey of 2016 (a transect sounding survey).
Anglers target brook trout on Triangle Lake.
Main-lake point is the top-rated area: a point in about 18 ft of water that rates good 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 Triangle 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.
Speckle Lake 2 mi · Lucas L. 2 mi · Lost Eye Lake 3 mi · Bolgers Lake 3 mi · Lillybet Lake 3 mi · Scarbo Lake 3 mi · Lupus Lake 3 mi · Long Lake 3 mi · Spice Lake 3 mi · Portage Lake 3 mi · Gaff Lake 3 mi · Endikai Lake 4 mi
See how Triangle Lake stacks up: best brook 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.