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Rating depth structure for lake trout.
Shared by DepthScout anglers. Exact spots stay private, always.
83-acre lake in Nipissing District, Ontario. The lake tops out around 43 ft. This chart interpolates between a real shoreline and a known maximum depth. It will point you at likely water, but it is not a navigation product. Here is how the season plays out for each species, straight from the data behind the map.
Tremblay Lake maps at 86 acres behind 2.5 miles of shoreline. A middling shoreline index (1.9) gives it some bays to work without being a maze. Littoral water — the productive band under ~15 ft — makes up 56% of this chart, as modeled. The basin spans about 1 mi end to end and 0.2 mi across at its widest. Nipissing District claims this one. Crocan Lake sits 2 mi southeast — the closest neighbouring chart.
Spring lake trout on Tremblay Lake hold shallow, usually 10 to 40 ft. They move out to 13 to 43 ft in summer and finish the year down in 11 to 43 ft. Put Deep basin first on the milk run — a deep basin near 37 ft that grades prime for summer. The feeding windows run early morning. The summer box starts with a white tube jig (deep) or a magnum spoon on downrigger.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 10 to 40 ft | dawn & dusk | Main-lake point (11 ft) | Casting spoon over shoals, Jerkbait (shallow) |
| Summer | 13 to 43 ft | dawn | Deep basin (37 ft) | White tube jig (deep), Magnum spoon on downrigger |
| Fall | 9 to 43 ft | dusk & dawn | Main-lake point (11 ft) | Heavy casting spoon, Jigging rap over reefs |
| Winter | 11 to 43 ft | dawn | Deep basin (37 ft) | White tube jig, Airplane jig |
In spring, lake whitefish run shallow here, mostly 13 to 43 ft. Summer keeps them at 13 to 43 ft, and they winter in 13 to 43 ft. Summer lake whitefish concentrate at Deep basin, a prime-rated deep basin around 37 ft. Fish it in early morning and you'll meet the bite. You won't need more than a blade bait vertical or a small jigging spoon most summer days.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 13 to 43 ft | midday & dawn | Break off the point (19 ft) | Small jig + waxworm, Blade bait (small) |
| Summer | 13 to 43 ft | dawn | Deep basin (37 ft) | Blade bait vertical, Small jigging spoon |
| Fall | 8 to 30 ft | dusk | Break off the point (19 ft) | Small spoon (gold), Jig + plastic larva |
| Winter | 13 to 43 ft | midday & dawn | Deep basin (37 ft) | Jigging spoon + bead chain, Tungsten jig + waxie |
6 pieces of structure are mapped here — Deep basin, around 37 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 Tremblay Lake specifically, so confirm the current rules before you fish.
Check the official Ontario fishing regulations →
Tremblay Lake is about 43 ft (13 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, lake whitefish on Tremblay Lake.
Deep basin is the top-rated area: a deep basin in about 37 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 Tremblay 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.
Crocan Lake 2 mi · Campbell Lake 2 mi · Timber Lake 2 mi · Butler L. 697 3 mi · Little Mountain Lake 4 mi · Butler Lake 4 mi · Mountain Lake 5 mi · Boot Lake 5 mi · Langevin Lake 5 mi · Beaudry Lake 5 mi · Ring Lake 5 mi · Alexis Lake 5 mi
See how Tremblay Lake stacks up: best lake trout lakes in Ontario · best lake whitefish lakes in Ontario
More water nearby: Nipissing District fishing maps (683 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.