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Rating depth structure for brook trout.
Recent public catches load as you reach this section.
21-acre lake in Thunder Bay District, Ontario. The lake tops out around 62 ft. The depth picture is modeled, anchored to the true shoreline and the water's published max depth — a scouting aid, never a chart to run a boat by. The season-by-season read for each species follows, from the map's own numbers.
Drawn out, this is 22 acres of water rimmed by 1.2 miles of bank. The shoreline is moderately structured (index 1.8) — enough points and pockets to pattern. Roughly 38% of the water is 15 ft or less as modeled, the band where the food chain lives. Call it 0.5 mi long by 0.2 mi wide at the broadest reach. You'll find it in Thunder Bay District. Closest neighbour on DepthScout: Fall Lake, 2 mi east of here.
In spring, brook trout run shallow here, mostly 2 to 15 ft. Summer pushes them deeper, 10 to 30 ft, and winter fish settle into 3 to 20 ft. Break off the point is the standout, a drop-off at roughly 28 ft, rated prime for summer brook trout. Time it for early morning and the evening. 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 (16 ft) | Small inline spinner (gold), Tiny spoon |
| Summer | 10 to 30 ft | dawn & dusk | Break off the point (28 ft) | Small spoon fished deep, Trolled lake-clear wobbler + worm |
| Fall | 2 to 15 ft | midday & dawn | Main-lake point (16 ft) | Small spoon (orange), Spinner |
| Winter | 3 to 20 ft | dawn | Shallow bay flat (6 ft) | Small jigging spoon, Tungsten jig + plastic |
Count 5 structure marks on this chart. The deepest, Deep basin, sits near 53 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 Welburn Lake specifically, so confirm the current rules before you fish.
Check the official Ontario fishing regulations →
Welburn Lake is about 62 ft (19 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 brook trout on Welburn Lake.
Break off the point is the top-rated area: a drop-off in about 28 ft of water that rates prime for brook trout in summer. 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 Welburn 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.
Fall Lake 2 mi · Miner Lake 2 mi · Billy Lake 2 mi · Wiggins Lake 2 mi · Bat Lake 3 mi · Cavern Lake 3 mi · Innes Lake 3 mi · Nolan Lake 3 mi · Bishops Lake 3 mi · Himdick Lake 4 mi · MacIntosh Lake 4 mi · Furcate Lake 4 mi
See how Welburn Lake stacks up: best brook trout lakes in Ontario
More water nearby: Thunder Bay District fishing maps (662 charts). Browse all Ontario fishing maps. 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.