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185-acre lake in Thunder Bay District, Ontario. The lake tops out around 100 ft. The depth data here comes from a transect sounding survey by the Ontario MNRF. Below is the species-by-species picture, pulled from the same data the map uses.
The drawn water covers 185 acres wrapped in 3.1 miles of bank. With a 1.6 development index there's bank structure worth casting at, in moderation. Roughly 7% of the water is 15 ft or less, the band where the food chain lives. The basin spans about 1.1 mi end to end and 0.6 mi across at its widest. Thunder Bay District claims this one. If the bite dies, Driftstone Lake is 4 mi to the north.
When the water first warms, lake trout slide up into 10 to 40 ft. Summer is a 30 to 100 ft game here, winter a 20 to 80 ft one. Start at Deep basin. It's a deep basin holding about 100 ft of water and rates prime come summer. The feeding windows run early morning. Keep a white tube jig (deep) or a magnum spoon on downrigger rigged through the warm months.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 10 to 40 ft | dawn & dusk | Main-lake point (20 ft) | Casting spoon over shoals, Jerkbait (shallow) |
| Summer | 30 to 100 ft | dawn | Deep basin (100 ft) | White tube jig (deep), Magnum spoon on downrigger |
| Fall | 10 to 50 ft | dusk & dawn | Main-lake point (20 ft) | Heavy casting spoon, Jigging rap over reefs |
| Winter | 20 to 80 ft | dawn | Break off the point (62 ft) | White tube jig, Airplane jig |
Count 6 structure marks on this chart. The deepest, Deep basin, sits near 100 ft.
Access data: Land Information Ontario — Fishing Access Point. Confirm conditions and fees locally before you launch.
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 Stewart Lake specifically, so confirm the current rules before you fish.
Check the official Ontario fishing regulations →
Stewart Lake is about 100 ft (30 m) deep at its deepest point. The depth data here comes from a transect sounding survey by the Ontario MNRF.
Anglers target lake trout on Stewart Lake.
Deep basin is the top-rated area: a deep basin in about 100 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 Stewart 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.
Driftstone Lake 4 mi · Bishops Lake 6 mi · Golden Gate Lake 7 mi · Wolfpup Lake 7 mi · Cavern Lake 7 mi · Miner Lake 8 mi · Bat Lake 8 mi · Fall Lake 8 mi · Innes Lake 9 mi · Welburn Lake 9 mi · Billy Lake 10 mi · Wiggins Lake 10 mi
See how Stewart Lake stacks up: best lake 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.