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Shared by DepthScout anglers. Exact spots stay private, always.
87-acre lake in Sudbury District, Ontario. The lake tops out around 34 ft. Bathymetry on this water is estimated from its real outline and maximum depth. Use it to shortlist water, then verify with your electronics — and never navigate by it. The season-by-season read for each species follows, from the map's own numbers.
Duff Lake maps at 86 acres behind 3.1 miles of shoreline. An index of 2.4 puts the bank firmly in maze territory: point after pocket after cove, every one a casting target. Littoral water — the productive band under ~15 ft — makes up 75% of this chart, as modeled. End to end it runs roughly 0.7 mi, about 0.6 mi across. Sudbury District claims this one. Dee's Lake sits 3 mi northeast — the closest neighbouring chart.
When the water first warms, brook trout slide up into 2 to 15 ft. Summer is a 10 to 30 ft game here, winter a 3 to 20 ft one. Start at Deep basin. It's a deep basin holding about 29 ft of water and rates prime come summer. The feeding windows run early morning and the evening. Keep a small spoon fished deep or a trolled lake-clear wobbler + worm rigged through the warm months.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 15 ft | dawn & dusk | Main-lake point (9 ft) | Small inline spinner (gold), Tiny spoon |
| Summer | 10 to 30 ft | dawn & dusk | Deep basin (29 ft) | Small spoon fished deep, Trolled lake-clear wobbler + worm |
| Fall | 2 to 15 ft | midday & dawn | Main-lake point (9 ft) | Small spoon (orange), Spinner |
| Winter | 3 to 20 ft | dawn | Break off the point (15 ft) | Small jigging spoon, Tungsten jig + plastic |
Spring puts lake whitefish in skinny water — 10 to 34 ft is the zone. Summer fish stay in 10 to 34 ft, and winter fish hold in 10 to 34 ft. Deep basin is the standout, a deep basin at roughly 29 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 | 10 to 34 ft | midday & dawn | Break off the point (15 ft) | Small jig + waxworm, Blade bait (small) |
| Summer | 10 to 34 ft | dawn | Deep basin (29 ft) | Blade bait vertical, Small jigging spoon |
| Fall | 8 to 30 ft | dusk | Break off the point (15 ft) | Small spoon (gold), Jig + plastic larva |
| Winter | 10 to 34 ft | midday & dawn | Deep basin (29 ft) | Jigging spoon + bead chain, Tungsten jig + waxie |
The chart marks 6 structure features on Duff Lake; the deepest is Deep basin at about 29 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 Duff Lake specifically, so confirm the current rules before you fish.
Check the official Ontario fishing regulations →
Duff Lake is about 34 ft (10 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, lake whitefish on Duff Lake.
Deep basin is the top-rated area: a deep basin in about 29 ft of water that rates prime for lake whitefish 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 Duff 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.
Dee's Lake 3 mi · Florence Lake 4 mi · Chance Lake 6 mi · Chalice Lake 6 mi · Jim Edwards Lake 6 mi · Jerry Lake 6 mi · Gamble Lake 7 mi · Whitepine Lake 7 mi · McCulloch Lake 7 mi · Elissa Lake 7 mi · Macpherson Lake 7 mi · Mihell Lake 7 mi
See how Duff Lake stacks up: best brook trout lakes in Ontario · best lake whitefish lakes in Ontario
More water nearby: Sudbury District fishing maps (868 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.