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8-acre lake in Sudbury District, Ontario. The lake tops out around 26 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 1981 (a transect sounding survey). Every species below gets its seasonal read from the same numbers driving the chart.
Traced from the shoreline, Mousseau Lake runs 8 acres with 0.5 miles of edge. Nearly circular (index 1.3), so the story is the bottom, not the bank. About 61% of the surface sits shallower than 15 ft — that's the weed-and-bait zone. The water lies in Sudbury District. Closest neighbour on DepthScout: Soucie Lake, 2 mi northwest of here.
Spring puts brook trout in skinny water — 2 to 15 ft is the zone. Warm water sends them out to 8 to 26 ft; cold water stacks them in 3 to 20 ft. Deep basin is the standout, a deep basin at roughly 26 ft, rated prime for summer brook trout. Plan around early morning and the evening in the warm months. A small spoon fished deep or a trolled lake-clear wobbler + worm covers the summer program.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 15 ft | dawn & dusk | Shallow bay flat (4 ft) | Small inline spinner (gold), Tiny spoon |
| Summer | 8 to 26 ft | dawn & dusk | Deep basin (26 ft) | Small spoon fished deep, Trolled lake-clear wobbler + worm |
| Fall | 2 to 15 ft | midday & dawn | open water | Small spoon (orange), Spinner |
| Winter | 3 to 20 ft | dawn | Shoreline break (12 ft) | Small jigging spoon, Tungsten jig + plastic |
The chart marks 4 structure features on Mousseau Lake; the deepest is Deep basin at about 26 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 Mousseau Lake specifically, so confirm the current rules before you fish.
Check the official Ontario fishing regulations →
Mousseau Lake is about 26 ft (8 m) deep at its deepest point. The depth data here comes from the Ontario MNRF survey of 1981 (a transect sounding survey).
Anglers target brook trout on Mousseau Lake.
Deep basin is the top-rated area: a deep basin in about 26 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 Mousseau 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.
Soucie Lake 2 mi · Larchwood L. 3 mi · Benson Lake 3 mi · Second L. 3 mi · Mudhole L. 4 mi · Ermatinger L. 50 5 mi · Clear Lake 5 mi · Johnson Lake 5 mi · Moon Lake 5 mi · Long Lake 5 mi · Loon Lake 5 mi · Dowes Lake 5 mi
See how Mousseau 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. 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.