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Rating depth structure for lake trout.
Shared by DepthScout anglers. Exact spots stay private, always.
11-acre lake in Algoma District, Ontario. The lake tops out around 49 ft. What you see is a modeled chart: the shoreline is real, the max depth is published, and the contours between are estimated. Plan with it; don't navigate by it. What follows comes from the same scoring engine that paints the spots above.
Traced from the shoreline, Gervais L. 13 runs 11 acres with 0.6 miles of edge. At index 1.3 the outline is almost a bowl — read the depth changes, not the shoreline. Littoral water — the productive band under ~15 ft — makes up 26% of this chart, as modeled. You'll find it in Algoma District. The nearest mapped water is Barn Lake, 0 mi to the west.
Spring puts lake trout in skinny water — 10 to 40 ft is the zone. Warm water sends them out to 15 to 49 ft; cold water stacks them in 12 to 49 ft. Deep basin is the standout, a deep basin at roughly 42 ft, rated prime for summer lake trout. Plan around early morning in the warm months. A white tube jig (deep) or a magnum spoon on downrigger covers the summer program.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 10 to 40 ft | dawn & dusk | Shoreline break (22 ft) | Casting spoon over shoals, Jerkbait (shallow) |
| Summer | 15 to 49 ft | dawn | Deep basin (42 ft) | White tube jig (deep), Magnum spoon on downrigger |
| Fall | 10 to 49 ft | dusk & dawn | Shoreline break (22 ft) | Heavy casting spoon, Jigging rap over reefs |
| Winter | 12 to 49 ft | dawn | Deep basin (42 ft) | White tube jig, Airplane jig |
3 pieces of structure are mapped here — Deep basin, around 42 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 Gervais L. 13 specifically, so confirm the current rules before you fish.
Check the official Ontario fishing regulations →
Gervais L. 13 is about 49 ft (15 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 lake trout on Gervais L. 13.
Deep basin is the top-rated area: a deep basin in about 42 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 Gervais L. 13 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.
Barn Lake 0 mi · Beebe L. 97 1 mi · Hotte L. 64 1 mi · Supple Lake 1 mi · Gervais L. 11 1 mi · Gervais L. 9 2 mi · Airport Lake 3 mi · Fifty-five Mile Lake 4 mi · Gervais L. 78 5 mi · Mozhabong Lake 5 mi · Gervais L. 1 5 mi · Foucault L. 10 5 mi
See how Gervais L. 13 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. 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.