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134-acre lake in Algoma District, Ontario. The lake tops out around 60 ft. The depth data here comes from the Ontario MNRF survey of 1967, a decades-old survey (a transect sounding survey). Every species below gets its seasonal read from the same numbers driving the chart.
On the chart, Byrnes Lake draws 135 acres inside 4.2 miles of shoreline, with 2 islands in the mix. That shoreline is heavily fingered (development index 2.6) — bays, points and pockets everywhere, which multiplies the fishable edge. Roughly 21% of the water is 15 ft or less, the band where the food chain lives. Figure 1.5 mi of water from one end to the other, 0.4 mi at the beam. You'll find it in Algoma District. Closest neighbour on DepthScout: Prospect Lake, 1 mi southeast of here.
Start shallow in spring: lake trout sit in 10 to 40 ft that time of year. Warm water sends them out to 18 to 60 ft; cold water stacks them in 15 to 60 ft. Top water on the chart: Deep basin, a deep basin in the 60 ft range, prime in summer. Fish it in early morning and you'll meet the bite. Throw a white tube jig (deep) or a magnum spoon on downrigger until the fish tell you otherwise.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 10 to 40 ft | dawn & dusk | Main-lake point (21 ft) | Casting spoon over shoals, Jerkbait (shallow) |
| Summer | 18 to 60 ft | dawn | Deep basin (60 ft) | White tube jig (deep), Magnum spoon on downrigger |
| Fall | 10 to 50 ft | dusk & dawn | Main-lake point (21 ft) | Heavy casting spoon, Jigging rap over reefs |
| Winter | 15 to 60 ft | dawn | Deep basin (60 ft) | White tube jig, Airplane jig |
Spring yellow perch on Byrnes Lake hold shallow, usually 3 to 12 ft. They move out to 10 to 30 ft in summer and finish the year down in 15 to 35 ft. Put Shallow bay flat first on the milk run — a weed flat near 5 ft that grades prime for spring. The feeding windows run early morning. The summer box starts with a drop-shot micro plastics or a small spoon tipped with worm.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 12 ft | midday & dawn | Shallow bay flat (5 ft) | Small jig + curly tail, Perch-pattern micro crank |
| Summer | 10 to 30 ft | dawn | Back-bay flat (19 ft) | Drop-shot micro plastics, Small spoon tipped with worm |
| Fall | 12 to 35 ft | midday | Break off the point (39 ft) | Jigging spoon (small), Perch rig / spreader |
| Winter | 15 to 35 ft | midday & dawn | Back-bay flat (19 ft) | Tungsten jig + spikes, Rattle spoon (small) |
Start shallow in spring: burbot sit in 18 to 60 ft that time of year. They don't go far with the seasons — 18 to 60 ft covers summer, 15 to 60 ft covers winter. Top water on the chart: Deep basin, a deep basin in the 60 ft range, prime in spring. Fish it in after dark and midday and you'll meet the bite. Throw a heavy jig + cut bait until the fish tell you otherwise.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 18 to 60 ft | night & dusk | Deep basin (60 ft) | Glow jigging spoon + cut bait, Rattle bait (dark) |
| Summer | 18 to 60 ft | night & midday | Deep basin (60 ft) | Heavy jig + cut bait |
| Fall | 18 to 60 ft | night & dusk | Deep basin (60 ft) | Glow spoon + minnow head, Blade bait (slow) |
| Winter | 15 to 60 ft | night & dusk | Deep basin (60 ft) | Glow tungsten + cut bait, Rattle spoon + minnow head |
6 pieces of structure are mapped here — Deep basin, around 60 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 Byrnes Lake specifically, so confirm the current rules before you fish.
Check the official Ontario fishing regulations →
Byrnes Lake is about 60 ft (18 m) deep at its deepest point. The depth data here comes from the Ontario MNRF survey of 1967, a decades-old survey (a transect sounding survey).
Anglers target lake trout, yellow perch, burbot on Byrnes Lake.
Deep basin is the top-rated area: a deep basin in about 60 ft of water that rates prime for lake trout in summer. The map above holds the full rated-spot list for every 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 Byrnes 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.
Prospect Lake 1 mi · Rainbow Lake 1 mi · Bailey Lake 2 mi · Loon Lake 2 mi · Shaw Dam Lake 3 mi · Shellrock Lake 4 mi · Burrows Lake 4 mi · Long Lake 4 mi · Birch Lake 4 mi · Wanamaker Lake 5 mi · Cranberry Lake 5 mi · Rock Lake 5 mi
See how Byrnes Lake stacks up: best yellow perch lakes in Ontario · best lake trout lakes in Ontario · best burbot 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.