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300-acre lake in Sudbury District, Ontario. The lake tops out around 74 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 1988 (an MNRF lake survey). Every species below gets its seasonal read from the same numbers driving the chart.
Traced from the shoreline, Mallard Lake runs 302 acres with 6.2 miles of edge, with a single island in the mix. With a shoreline index of 2.6, this water is all arms and coves — edge habitat well beyond its acreage. Roughly 93% of the water is 15 ft or less, the band where the food chain lives. The basin spans about 1.1 mi end to end and 0.9 mi across at its widest. The water lies in Sudbury District. The nearest mapped water is Rae Lake, 2 mi to the south.
Come spring, look for lake whitefish tight to the bank in 15 to 45 ft. Expect a summer slide to 22 to 74 ft, then a winter hold in 25 to 70 ft. Start at Deep basin. It's a deep basin holding about 66 ft of water and rates prime come summer. Prime time lands in early morning. A blade bait vertical or a small jigging spoon is the honest summer answer here.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 15 to 45 ft | midday & dawn | Break off the point (2 ft) | Small jig + waxworm, Blade bait (small) |
| Summer | 22 to 74 ft | dawn | Deep basin (66 ft) | Blade bait vertical, Small jigging spoon |
| Fall | 8 to 30 ft | dusk | Break off the point (2 ft) | Small spoon (gold), Jig + plastic larva |
| Winter | 25 to 70 ft | midday & dawn | Deep basin (66 ft) | Jigging spoon + bead chain, Tungsten jig + waxie |
Early season yellow perch use the shallows, holding in 3 to 12 ft. Expect a summer slide to 10 to 30 ft, then a winter hold in 15 to 35 ft. Put Shallow bay flat first on the milk run — a weed flat near 1 ft that grades prime for spring. In summer the feeding windows fall in early morning. Tie on a drop-shot micro plastics or a small spoon tipped with worm and you're in the game.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 12 ft | midday & dawn | Shallow bay flat (1 ft) | Small jig + curly tail, Perch-pattern micro crank |
| Summer | 10 to 30 ft | dawn | Break off the point (2 ft) | Drop-shot micro plastics, Small spoon tipped with worm |
| Fall | 12 to 35 ft | midday | Deep basin (66 ft) | Jigging spoon (small), Perch rig / spreader |
| Winter | 15 to 35 ft | midday & dawn | Deep basin (66 ft) | Tungsten jig + spikes, Rattle spoon (small) |
In spring, northern pike run shallow here, mostly 2 to 8 ft. Summer pushes them deeper, 8 to 20 ft, and winter fish settle into 5 to 15 ft. Shallow bay flat is the standout, a weed flat at roughly 1 ft, rated prime for spring northern pike. Time it for early morning and the evening. You won't need more than a bucktail or a weedless spoon over cabbage most summer days.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 8 ft | midday & dawn | Shallow bay flat (1 ft) | #5 inline spinner, Spoon (red/white) |
| Summer | 8 to 20 ft | dawn & dusk | Shallow bay flat (1 ft) | Bucktail, Weedless spoon over cabbage |
| Fall | 6 to 18 ft | midday & dawn | Break off the point (2 ft) | Big rubber (Bull Dawg style), Husky-style jerkbait |
| Winter | 5 to 15 ft | midday | Shallow bay flat (1 ft) | Tip-ups, Large jigging spoon |
Count 6 structure marks on this chart. The deepest, Deep basin, sits near 66 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 Mallard Lake specifically, so confirm the current rules before you fish.
Check the official Ontario fishing regulations →
Mallard Lake is about 74 ft (23 m) deep at its deepest point. The depth data here comes from the Ontario MNRF survey of 1988 (an MNRF lake survey).
Anglers target lake whitefish, yellow perch, northern pike on Mallard Lake.
Deep basin is the top-rated area: a deep basin in about 66 ft of water that rates prime for lake whitefish in summer. The interactive chart above rates every spot for each species and season.
For lake whitefish, 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 Mallard 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.
Rae Lake 2 mi · Rice Lake 5 mi · Rush Lake 5 mi · Opeepeesway Lake 6 mi · Pebonishewi Lake 8 mi · Northpoint Lake 8 mi · October Lake 11 mi · Garnet L. 895887 12 mi · Wolf Lake 12 mi · Trailbreaker Lake 12 mi · Heenan L. 18 12 mi · September Lake 13 mi
See how Mallard Lake stacks up: best northern pike lakes in Ontario · best yellow perch lakes in Ontario · best lake whitefish 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.