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Rating depth structure for lake trout.
Shared by DepthScout anglers. Exact spots stay private, always.
14-acre lake in Algoma District, Ontario. The lake tops out around 69 ft. The depth chart comes from Ontario Ministry of Natural Resources and Forestry bathymetric survey data, so the contours are survey-derived rather than computer-modeled. The depth data here comes from the Ontario MNRF survey of 2008 (a transect sounding survey). Every species below gets its seasonal read from the same numbers driving the chart.
Traced from the shoreline, Duthorne Lake runs 14 acres with 0.6 miles of edge. A shoreline index of 1.1 says round and simple: fish relate to depth changes here, not shoreline features. Littoral water — the productive band under ~15 ft — makes up 33% of this chart. The water lies in Algoma District. The nearest mapped water is Little Quirke Lake, 1 mi to the north.
In spring, lake trout run shallow here, mostly 10 to 40 ft. Summer pushes them deeper, 21 to 69 ft, and winter fish settle into 17 to 69 ft. Deep basin is the standout, a deep basin at roughly 59 ft, rated prime for summer lake trout. Time it for early morning. You won't need more than a white tube jig (deep) or a magnum spoon on downrigger most summer days.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 10 to 40 ft | dawn & dusk | Shoreline break (16 ft) | Casting spoon over shoals, Jerkbait (shallow) |
| Summer | 21 to 69 ft | dawn | Deep basin (59 ft) | White tube jig (deep), Magnum spoon on downrigger |
| Fall | 10 to 50 ft | dusk & dawn | Shoreline break (16 ft) | Heavy casting spoon, Jigging rap over reefs |
| Winter | 17 to 69 ft | dawn | Deep basin (59 ft) | White tube jig, Airplane jig |
3 pieces of structure are mapped here — Deep basin, around 59 ft, is the deepest of them.
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 Duthorne Lake specifically, so confirm the current rules before you fish.
Check the official Ontario fishing regulations →
Duthorne Lake is about 69 ft (21 m) deep at its deepest point. The depth data here comes from the Ontario MNRF survey of 2008 (a transect sounding survey).
Anglers target lake trout on Duthorne Lake.
Deep basin is the top-rated area: a deep basin in about 59 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 Duthorne 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.
Little Quirke Lake 1 mi · Quirke Lake 3 mi · Manydace L. 3 mi · Cinder Lake 3 mi · Potbelly L. 3 mi · Gander Lake 4 mi · Maybe L. 4 mi · Evans Lake 4 mi · Gashen Lake 4 mi · Bouck L. 21 4 mi · Mellon Lake 4 mi · Lolligag Lake 4 mi
See how Duthorne Lake stacks up: best lake trout lakes in Ontario
More water nearby: Algoma District fishing maps (1026 charts). Browse all Ontario fishing maps or see every water on DepthScout. Bathymetry: published agency survey data. 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.