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35-acre lake in Renfrew County, Ontario. The lake tops out around 13 ft. The depth data here comes from the Ontario MNRF survey of 1985 (a transect sounding survey). The rest of this page walks each species through its year, using the map's own scoring.
The drawn water covers 35 acres wrapped in 1.2 miles of bank. With a 1.5 development index there's bank structure worth casting at, in moderation. All of it is shallow-zone water — under ~15 ft across the entire basin, so the food chain has the run of the place. The basin spans about 0.4 mi end to end and 0.3 mi across at its widest. Renfrew County claims this one. If the bite dies, Owl Lake is 1 mi to the northwest.
The spring pattern is a shallow one: yellow perch in 3 to 12 ft. As the season builds they drop to 4 to 13 ft, wintering in 4 to 13 ft. Top water on the chart: Deep basin, a deep basin in the 13 ft range, prime in fall. Time it for early morning. Summer baits: a drop-shot micro plastics or a small spoon tipped with worm gets it done.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 12 ft | midday & dawn | Shallow bay flat (2 ft) | Small jig + curly tail, Perch-pattern micro crank |
| Summer | 4 to 13 ft | dawn | Deep basin (13 ft) | Drop-shot micro plastics, Small spoon tipped with worm |
| Fall | 4 to 13 ft | midday | Deep basin (13 ft) | Jigging spoon (small), Perch rig / spreader |
| Winter | 4 to 13 ft | midday & dawn | Deep basin (13 ft) | Tungsten jig + spikes, Rattle spoon (small) |
Come spring, look for largemouth bass tight to the bank in 2 to 10 ft. Expect a summer slide to 4 to 13 ft, then a winter hold in 4 to 13 ft. Start at Shallow bay flat. It's a weed flat holding about 2 ft of water and rates prime come spring. Prime time lands in early morning and the evening. A texas-rigged 10" worm or a deep-diving crankbait is the honest summer answer here.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 10 ft | dawn & dusk | Shallow bay flat (2 ft) | Spinnerbait, Chatterbait |
| Summer | 4 to 13 ft | dawn & dusk | Break off the point (7 ft) | Texas-rigged 10" worm, Deep-diving crankbait |
| Fall | 3 to 13 ft | midday & dawn | Main-lake point (4 ft) | Squarebill crankbait (shad), Spinnerbait |
| Winter | 4 to 13 ft | midday | Break off the point (7 ft) | Blade bait, Jigging spoon |
Start shallow in spring: pumpkinseed sit in 1 to 8 ft that time of year. Warm water sends them out to 2 to 10 ft; cold water stacks them in 4 to 13 ft. Top water on the chart: Shallow bay flat, a weed flat in the 2 ft range, prime in spring. Fish it in the evening and early morning and you'll meet the bite. Throw a micro tube or a sponge spider (fly) until the fish tell you otherwise.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 1 to 8 ft | midday & dusk | Shallow bay flat (2 ft) | Micro jig under a float, Tiny beetle-spin |
| Summer | 2 to 10 ft | dusk & dawn | Shallow bay flat (2 ft) | Micro tube, Sponge spider (fly) |
| Fall | 4 to 13 ft | dusk & dawn | Shallow bay flat (2 ft) | Micro jig + waxworm, Small spoon tipped |
| Winter | 4 to 13 ft | dawn | Deep basin (13 ft) | Tungsten ice jig + plastic, Tiny spoon |
Come spring, look for brown bullhead tight to the bank in 2 to 8 ft. They move out to 3 to 12 ft in summer and finish the year down in 4 to 13 ft. If you only fish one area, make it Deep basin: a deep basin around 13 ft that scores prime in winter. Best bite is after dark and the evening.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 8 ft | dusk & night | Shallow bay flat (2 ft) | |
| Summer | 3 to 12 ft | night & dusk | Shallow bay flat (2 ft) | |
| Fall | 4 to 13 ft | dusk | Deep basin (13 ft) | |
| Winter | 4 to 13 ft | midday | Deep basin (13 ft) |
The chart marks 5 structure features on Marys Lake; the deepest is Deep basin at about 13 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 Marys Lake specifically, so confirm the current rules before you fish.
Check the official Ontario fishing regulations →
Marys Lake is about 13 ft (4 m) deep at its deepest point. The depth data here comes from the Ontario MNRF survey of 1985 (a transect sounding survey).
Anglers target yellow perch, largemouth bass, pumpkinseed, brown bullhead on Marys Lake.
Deep basin is the top-rated area: a deep basin in about 13 ft of water that rates prime for yellow perch in fall. Every other rated spot, per species and season, is on the map above.
For yellow perch, 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 Marys 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.
Owl Lake 1 mi · Eeyore Lake 1 mi · Pooh Lake 2 mi · Tigger Lake 2 mi · Sweezy Lake 2 mi · Puffball Lake 3 mi · McKenna Lake 3 mi · Piglet Lake 3 mi · Oval Lake 3 mi · Christopher Robin Lake 4 mi · Soldier Lake 4 mi · Dunlop Lake 4 mi
See how Marys Lake stacks up: best largemouth bass lakes in Ontario · best yellow perch lakes in Ontario · best pumpkinseed lakes in Ontario · best brown bullhead lakes in Ontario
More water nearby: Renfrew County fishing maps (298 charts). Browse all Ontario fishing maps or see every water on DepthScout. Bathymetry credit: state fisheries survey programs. 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.