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31-acre lake in Sudbury District, Ontario. The lake tops out around 54 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 1960, a decades-old survey (an MNRF lake survey). What follows comes from the same scoring engine that paints the spots above.
Traced from the shoreline, Seven Mile Lake runs 31 acres with 1.1 miles of edge. At index 1.4 the outline is almost a bowl — read the depth changes, not the shoreline. 64% of the surface is littoral (under ~15 ft) — cover, weeds and forage water. Figure 0.4 mi of water from one end to the other, 0.2 mi at the beam. You'll find it in Sudbury District. Closest neighbour on DepthScout: Ruth Lake, 0 mi southwest of here.
The spring pattern is a shallow one: brook trout in 2 to 15 ft. As the season builds they drop to 10 to 30 ft, wintering in 3 to 20 ft. Top water on the chart: Break off the point, a drop-off in the 24 ft range, prime in summer. Time it for early morning and the evening. Summer baits: a small spoon fished deep or a trolled lake-clear wobbler + worm gets it done.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 15 ft | dawn & dusk | Main-lake point (1 ft) | Small inline spinner (gold), Tiny spoon |
| Summer | 10 to 30 ft | dawn & dusk | Break off the point (24 ft) | Small spoon fished deep, Trolled lake-clear wobbler + worm |
| Fall | 2 to 15 ft | midday & dawn | Main-lake point (1 ft) | Small spoon (orange), Spinner |
| Winter | 3 to 20 ft | dawn | Shallow bay flat (1 ft) | Small jigging spoon, Tungsten jig + plastic |
Start shallow in spring: splake sit in 5 to 25 ft that time of year. Warm water sends them out to 16 to 54 ft; cold water stacks them in 10 to 45 ft. Top water on the chart: Break off the point, a drop-off in the 24 ft range, prime in summer. Fish it in early morning and the evening and you'll meet the bite. Throw a trolled spoon at the thermocline or a white tube jig (deep) until the fish tell you otherwise.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 5 to 25 ft | dawn & dusk | Break off the point (24 ft) | Small casting spoon (gold/orange), Inline spinner |
| Summer | 16 to 54 ft | dawn & dusk | Break off the point (24 ft) | Trolled spoon at the thermocline, White tube jig (deep) |
| Fall | 10 to 35 ft | dawn & dusk | Break off the point (24 ft) | Casting spoon, Jerkbait |
| Winter | 10 to 45 ft | dawn | Break off the point (24 ft) | Jigging spoon tipped with minnow head, Small white tube |
4 pieces of structure are mapped here — Deep basin, around 48 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 Seven Mile Lake specifically, so confirm the current rules before you fish.
Check the official Ontario fishing regulations →
Seven Mile Lake is about 54 ft (16 m) deep at its deepest point. The depth data here comes from the Ontario MNRF survey of 1960, a decades-old survey (an MNRF lake survey).
Anglers target brook trout, splake on Seven Mile Lake.
Break off the point is the top-rated area: a drop-off in about 24 ft of water that rates prime for splake in summer. The interactive chart above rates every spot for each species and season.
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 Seven Mile 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.
Ruth Lake 0 mi · McLennan Lake 1 mi · Chappise L. 8 1 mi · Moodie Lake 1 mi · Olympic Lake 2 mi · Trap Lake 2 mi · Trap Creek 2 mi · Pack Sack Lake 2 mi · Poulin Lake 2 mi · Corner L. 3 mi · Louise Lake 3 mi · Wiener Lake 3 mi
See how Seven Mile Lake stacks up: best brook trout lakes in Ontario · best splake 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.