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Shared by DepthScout anglers. Exact spots stay private, always.
100-acre lake in Sudbury District, Ontario. The lake tops out around 33 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.
Boundary Lake maps at 99 acres behind 2.6 miles of shoreline. A middling shoreline index (1.9) gives it some bays to work without being a maze. About 51% of the surface sits shallower than 15 ft on the modeled chart — that's the weed-and-bait zone. The basin spans about 0.9 mi end to end and 0.4 mi across at its widest. Sudbury District claims this one. If the bite dies, May Lake is 2 mi to the west.
Come spring, look for brook trout tight to the bank in 2 to 15 ft. They move out to 10 to 30 ft in summer and finish the year down in 3 to 20 ft. If you only fish one area, make it Deep basin: a deep basin around 28 ft that scores prime in summer. Best bite is early morning and the evening. A small spoon fished deep or a trolled lake-clear wobbler + worm is the honest summer answer here.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 15 ft | dawn & dusk | Main-lake point (8 ft) | Small inline spinner (gold), Tiny spoon |
| Summer | 10 to 30 ft | dawn & dusk | Deep basin (28 ft) | Small spoon fished deep, Trolled lake-clear wobbler + worm |
| Fall | 2 to 15 ft | midday & dawn | Main-lake point (8 ft) | Small spoon (orange), Spinner |
| Winter | 3 to 20 ft | dawn | Break off the point (15 ft) | Small jigging spoon, Tungsten jig + plastic |
Structure-wise the chart holds 6 features, led in depth by Deep basin at roughly 28 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 Boundary Lake specifically, so confirm the current rules before you fish.
Check the official Ontario fishing regulations →
Boundary Lake is about 33 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 on Boundary Lake.
Deep basin is the top-rated area: a deep basin in about 28 ft of water that rates prime for brook trout in summer. Every other rated spot, per species and season, is on the map above.
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 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.
May Lake 2 mi · Gough L. 5 3 mi · Streich Lake 4 mi · Maville Lake 4 mi · Birch Lake 4 mi · Neumann Lake 4 mi · Kerr Lake 5 mi · Savage Lake 5 mi · McLander Lake 5 mi · McGuey Lake 6 mi · Stalker Lake 7 mi · Moyle Lake 7 mi
See how Boundary Lake stacks up: best brook trout 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.