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Rating depth structure for lake trout.
Shared by DepthScout anglers. Exact spots stay private, always.
266-acre lake in Algoma District, Ontario. The lake tops out around 141 ft. Depth here is modeled from the true shoreline and max depth rather than surveyed; use it to plan, not to navigate. Every species below gets its seasonal read from the same numbers driving the chart.
Sister Lake maps at 266 acres behind 3.3 miles of shoreline. A shoreline index of 1.4 says round and simple: fish relate to depth changes here, not shoreline features. The shallow band under 15 ft claims about 6% of the surface on the model — that's where the groceries are. The basin spans about 1.3 mi end to end and 0.6 mi across at its widest. Algoma District claims this one. Its nearest charted neighbour, Rosemarie Lake, is 2 mi to the northeast.
Early season lake trout use the shallows, holding in 10 to 40 ft. Summer is a 50 to 120 ft game here, winter a 20 to 80 ft one. The chart's best answer is Deep basin — deep basin, 120 ft, prime for summer. Best bite is early morning. Tie on a white tube jig (deep) or a magnum spoon on downrigger and you're in the game.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 10 to 40 ft | dawn & dusk | Main-lake point (35 ft) | Casting spoon over shoals, Jerkbait (shallow) |
| Summer | 50 to 120 ft | dawn | Deep basin (120 ft) | White tube jig (deep), Magnum spoon on downrigger |
| Fall | 10 to 50 ft | dusk & dawn | Main-lake point (35 ft) | Heavy casting spoon, Jigging rap over reefs |
| Winter | 20 to 80 ft | dawn | Break off the point (63 ft) | White tube jig, Airplane jig |
Early season burbot use the shallows, holding in 25 to 70 ft. Summer is a 50 to 120 ft game here, winter a 15 to 60 ft one. The chart's best answer is Deep basin — deep basin, 120 ft, prime for summer. Best bite is after dark and midday. Tie on a heavy jig + cut bait and you're in the game.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 25 to 70 ft | night & dusk | Break off the point (63 ft) | Glow jigging spoon + cut bait, Rattle bait (dark) |
| Summer | 50 to 120 ft | night & midday | Deep basin (120 ft) | Heavy jig + cut bait |
| Fall | 30 to 80 ft | night & dusk | Break off the point (63 ft) | Glow spoon + minnow head, Blade bait (slow) |
| Winter | 15 to 60 ft | night & dusk | Break off the point (63 ft) | Glow tungsten + cut bait, Rattle spoon + minnow head |
Structure-wise the chart holds 6 features, led in depth by Deep basin at roughly 120 ft.
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 Sister Lake specifically, so confirm the current rules before you fish.
Check the official Ontario fishing regulations →
Sister Lake is about 141 ft (43 m) deep at its deepest point. The contours here are modeled from the water's real shape and maximum depth, so treat them as a rough guide.
Anglers target lake trout, burbot on Sister Lake.
Deep basin is the top-rated area: a deep basin in about 120 ft of water that rates prime for lake trout in summer. The interactive chart above rates every spot for each 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 Sister 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.
Rosemarie Lake 2 mi · Rawhide Lake 2 mi · Skunk Lake 3 mi · Bilton Lake 4 mi · Applesauce Lake 4 mi · Alexander Lake 4 mi · Burnt Lake 4 mi · Moon Lake 5 mi · Grey Trout Lake 6 mi · Rottier L. 6 mi · Helenbar Lake 6 mi · Gashen Lake 6 mi
See how Sister Lake stacks up: 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. 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.