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Rating depth structure for lake trout.
Recent public catches load as you reach this section.
73-acre lake in Algoma District, Ontario. The lake tops out around 79 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 2020 (an MNRF lake survey). The rest of this page walks each species through its year, using the map's own scoring.
The drawn water covers 74 acres wrapped in 2.6 miles of bank. With a 2.1 development index there's bank structure worth casting at, in moderation. The shallow band under 15 ft claims about 16% of the surface — that's where the groceries are. Tip to tip the water measures near 0.8 mi with a 0.3-mi widest point. It sits in Algoma District. Villenue L. 3 (Black L./29, L.) sits 1 mi southwest — the closest neighbouring chart.
These fish are listed in an exact-water agency record as forage or ecological context. They are not target-species profiles and do not affect DepthScout's Prime, Good, or Fair spot ratings.
Official Ontario MNRF Fish ON-Line record. The listing documents source-recorded presence, not present abundance or guaranteed catchability.
Come spring, look for lake trout tight to the bank in 10 to 40 ft. Expect a summer slide to 24 to 79 ft, then a winter hold in 20 to 79 ft. Start at Deep basin. It's a deep basin holding about 77 ft of water and rates prime come summer. Prime time lands in early morning. A white tube jig (deep) or a magnum spoon on downrigger is the honest summer answer here.
Depth note: when a documented seasonal range extends below this chart, the table shows the deepest mapped working water, not a verified holding depth.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 10 to 40 ft | dawn & dusk | Main-lake point (32 ft) | Casting spoon over shoals, Jerkbait (shallow) |
| Summer | 24 to 79 ft chart-limited; documented 50 to 120 ft | dawn | Deep basin (77 ft) | White tube jig (deep), Magnum spoon on downrigger |
| Fall | 10 to 50 ft | dusk & dawn | Main-lake point (32 ft) | Heavy casting spoon, Jigging rap over reefs |
| Winter | 20 to 79 ft chart-limited; documented 20 to 80 ft | dawn | Deep basin (77 ft) | White tube jig, Airplane jig |
Boundary Lake carries 6 mapped structure features, topping out (or rather bottoming out) at Deep basin, about 77 ft down.
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 Boundary Lake specifically, so confirm the current rules before you fish.
Check the official Ontario fishing regulations →
Boundary Lake is about 79 ft (24 m) deep at its deepest point. The depth data here comes from the Ontario MNRF survey of 2020 (an MNRF lake survey).
Anglers target lake trout on Boundary Lake.
Deep basin is the top-rated area: a deep basin in about 77 ft of water that rates prime for lake trout in summer. Open the map above to see every rated 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 Boundary 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.
Villenue L. 3 (Black L./29, L.) 1 mi · Slot Lake 1 mi · McClung Lake 2 mi · Aubrey Lake 4 mi · Charette Lake 5 mi · Horseshoe Lake 5 mi · Mashagama Lake 6 mi · Sawbill Lake 6 mi · Heal Lake 6 mi · Wye Lake 7 mi · Nancy L. 7 mi · Three Lakes 8 mi
See how Boundary Lake stacks up: best lake trout lakes in Ontario
More water nearby: Algoma District fishing maps (1026 charts). Browse all Ontario fishing maps. 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.