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100-acre lake in Cochrane District, Ontario. The lake tops out around 100 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 1962, a decades-old survey (an MNRF lake survey). What the data behind the map says about each species, season by season:
Drawn out, this is 98 acres of water rimmed by 1.7 miles of bank. At index 1.2 the outline is almost a bowl — read the depth changes, not the shoreline. 46% of the surface is littoral (under ~15 ft) — cover, weeds and forage water. End to end it runs roughly 0.5 mi, about 0.5 mi across. You'll find it in Cochrane District. For a second option, Aquarius L. lies 1 mi northwest.
Come spring, look for yellow perch tight to the bank in 3 to 12 ft. They move out to 10 to 30 ft in summer and finish the year down in 15 to 35 ft. If you only fish one area, make it Break off the point: a drop-off around 20 ft that scores prime in summer. Best bite is early morning. A drop-shot micro plastics or a small spoon tipped with worm is the honest summer answer here.
| 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 (20 ft) | Drop-shot micro plastics, Small spoon tipped with worm |
| Fall | 12 to 35 ft | midday | Break off the point (20 ft) | Jigging spoon (small), Perch rig / spreader |
| Winter | 15 to 35 ft | midday & dawn | Break off the point (20 ft) | Tungsten jig + spikes, Rattle spoon (small) |
Start shallow in spring: northern pike sit in 2 to 8 ft that time of year. Warm water sends them out to 8 to 20 ft; cold water stacks them in 5 to 15 ft. Top water on the chart: Shallow bay flat, a weed flat in the 1 ft range, prime in spring. Fish it in early morning and the evening and you'll meet the bite. Throw a bucktail or a weedless spoon over cabbage until the fish tell you otherwise.
| 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 | Break off the point (20 ft) | Bucktail, Weedless spoon over cabbage |
| Fall | 6 to 18 ft | midday & dawn | Break off the point (20 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 5 structure marks on this chart. The deepest, Deep basin, sits near 100 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 Roundelay Lake specifically, so confirm the current rules before you fish.
Check the official Ontario fishing regulations →
Roundelay Lake is about 100 ft (30 m) deep at its deepest point. The depth data here comes from the Ontario MNRF survey of 1962, a decades-old survey (an MNRF lake survey).
Anglers target yellow perch, northern pike on Roundelay Lake.
Break off the point is the top-rated area: a drop-off in about 20 ft of water that rates prime for yellow perch in summer. The interactive chart above rates every spot for each species and season.
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 Roundelay 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.
Aquarius L. 1 mi · Legare Lake 1 mi · Deep Lake 2 mi · Vader's Lake 2 mi · McCoshen Lake 2 mi · Homestead Lake 2 mi · Round Lake 3 mi · Pexton Lake 3 mi · Slab Lake 3 mi · Long Lake 3 mi · La Viollette Lake 3 mi · Deer Lake 4 mi
See how Roundelay Lake stacks up: best northern pike lakes in Ontario · best yellow perch lakes in Ontario
More water nearby: Cochrane District fishing maps (673 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.