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255-acre lake in Algoma District, Ontario. The lake tops out around 50 ft. The depth data here comes from the Ontario MNRF survey of 1967, a decades-old survey (a transect sounding survey). What follows comes from the same scoring engine that paints the spots above.
The drawn water covers 256 acres wrapped in 4.9 miles of bank, broken up by an island. An index of 2.2 puts the bank firmly in maze territory: point after pocket after cove, every one a casting target. The shallow band under 15 ft claims about 39% of the surface — that's where the groceries are. End to end it runs roughly 1.7 mi, about 0.5 mi across. Algoma District claims this one. Grey Trout Lake sits 1 mi south — the closest neighbouring chart.
Early season lake trout use the shallows, holding in 10 to 40 ft. Summer is a 15 to 50 ft game here, winter a 13 to 50 ft one. The chart's best answer is Deep basin — deep basin, 50 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 | Break off the point (20 ft) | Casting spoon over shoals, Jerkbait (shallow) |
| Summer | 15 to 50 ft | dawn | Deep basin (50 ft) | White tube jig (deep), Magnum spoon on downrigger |
| Fall | 10 to 50 ft | dusk & dawn | Break off the point (20 ft) | Heavy casting spoon, Jigging rap over reefs |
| Winter | 13 to 50 ft | dawn | Deep basin (50 ft) | White tube jig, Airplane jig |
Spring puts lake whitefish in skinny water — 15 to 45 ft is the zone. Warm water sends them out to 15 to 50 ft; cold water stacks them in 15 to 50 ft. Deep basin is the standout, a deep basin at roughly 50 ft, rated prime for summer lake whitefish. Plan around early morning in the warm months. A blade bait vertical or a small jigging spoon covers the summer program.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 15 to 45 ft | midday & dawn | Break off the point (20 ft) | Small jig + waxworm, Blade bait (small) |
| Summer | 15 to 50 ft | dawn | Deep basin (50 ft) | Blade bait vertical, Small jigging spoon |
| Fall | 8 to 30 ft | dusk | Break off the point (20 ft) | Small spoon (gold), Jig + plastic larva |
| Winter | 15 to 50 ft | midday & dawn | Deep basin (50 ft) | Jigging spoon + bead chain, Tungsten jig + waxie |
Spring smallmouth bass on Rottier L. hold shallow, usually 3 to 12 ft. By summer they slide out to 10 to 30 ft, and by winter most fish are in 20 to 45 ft. The chart's best answer is Break off the point — drop-off, 20 ft, prime for winter. Prime time lands in early morning and the evening. The summer box starts with a drop shot (goby/minnow) or a ned rig.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 12 ft | dawn & dusk | Main-lake point (1 ft) | Ned rig, Tube jig |
| Summer | 10 to 30 ft | dawn & dusk | Break off the point (20 ft) | Drop shot (goby/minnow), Ned rig |
| Fall | 8 to 25 ft | midday & dawn | Break off the point (20 ft) | Jerkbait, Blade bait |
| Winter | 20 to 45 ft | midday | Break off the point (20 ft) | Blade bait, Hair jig |
Early season burbot use the shallows, holding in 15 to 50 ft. Even in summer they hold at 15 to 50 ft; winter keeps them in 13 to 50 ft. The chart's best answer is Deep basin — deep basin, 50 ft, prime for spring. 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 | 15 to 50 ft | night & dusk | Deep basin (50 ft) | Glow jigging spoon + cut bait, Rattle bait (dark) |
| Summer | 15 to 50 ft | night & midday | Deep basin (50 ft) | Heavy jig + cut bait |
| Fall | 15 to 50 ft | night & dusk | Deep basin (50 ft) | Glow spoon + minnow head, Blade bait (slow) |
| Winter | 13 to 50 ft | night & dusk | Deep basin (50 ft) | Glow tungsten + cut bait, Rattle spoon + minnow head |
Structure-wise the chart holds 6 features, led in depth by Deep basin at roughly 50 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 Rottier L. specifically, so confirm the current rules before you fish.
Check the official Ontario fishing regulations →
Rottier L. is about 50 ft (15 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, lake whitefish, smallmouth bass, burbot on Rottier L..
Deep basin is the top-rated area: a deep basin in about 50 ft of water that rates prime for lake trout in summer. Every other rated spot, per species and season, is on the map above.
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 Rottier L. 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.
Grey Trout Lake 1 mi · Moon Lake 2 mi · Mount Lake 2 mi · Burnt Lake 2 mi · Stewleen Lake 3 mi · Winchester Lake 3 mi · Bevans Lake 3 mi · Tee Lake 3 mi · Sam Lake 4 mi · Mud Lake 4 mi · West Ritchie Lake 4 mi · Bilton Lake 4 mi
See how Rottier L. stacks up: best smallmouth bass lakes in Ontario · best lake trout lakes in Ontario · best lake whitefish 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.