Sign inSign up free Sign inSign up free Sign inSign up freeLake depth chart
Today's read
Recent public catches load as you reach this section.
400-acre lake in Cochrane District, Ontario. The lake tops out around 14 ft. Bathymetry on this water is estimated from its real outline and maximum depth. Use it to shortlist water, then verify with your electronics — and never navigate by it. What the data behind the map says about each species, season by season:
The drawn water covers 399 acres wrapped in 8.6 miles of bank. An index of 3.1 puts the bank firmly in maze territory: point after pocket after cove, every one a casting target. The whole water is littoral — nothing here runs deeper than ~15 ft, so it's all weed-and-bait territory. End to end it runs roughly 2.2 mi, about 1 mi across. Cochrane District claims this one. Its nearest charted neighbour, Valentine Lake, is 2 mi to the northeast.
In spring, walleye run shallow here, mostly 4 to 14 ft. Summer keeps them at 4 to 14 ft, and they winter in 4 to 14 ft. Break off the point is the standout, a drop-off at roughly 6 ft, rated prime for fall walleye. Time it for the evening and early morning. You won't need more than a crawler harness on bottom bouncer or a deep crankbait (trolled) most summer days.
Depth note: when a documented seasonal range extends below this chart, the table shows the deepest mapped working water, not a verified holding depth.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 4 to 14 ft chart-limited; documented 4 to 15 ft | dusk & dawn | Main-lake point (8 ft) | 1/8 oz jig + minnow, Hair jig |
| Summer | 4 to 14 ft chart-limited; documented 15 to 35 ft | dusk & dawn | Break off the point (6 ft) | Crawler harness on bottom bouncer, Deep crankbait (trolled) |
| Fall | 4 to 14 ft chart-limited; documented 12 to 40 ft | dusk & night | Break off the point (6 ft) | Jigging rap, Jig + big minnow |
| Winter | 4 to 14 ft chart-limited; documented 20 to 40 ft | dusk & dawn | Deep basin (12 ft) | Jigging spoon + minnow head, Rattle bait |
The spring pattern is a shallow one: yellow perch in 3 to 12 ft. As the season builds they drop to 4 to 14 ft, wintering in 4 to 14 ft. Top water on the chart: Shallow bay flat, a weed flat in the 3 ft range, prime in spring. Time it for early morning. Summer baits: a drop-shot micro plastics or a small spoon tipped with worm gets it done.
Depth note: when a documented seasonal range extends below this chart, the table shows the deepest mapped working water, not a verified holding depth.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 12 ft | midday & dawn | Shallow bay flat (3 ft) | Small jig + curly tail, Perch-pattern micro crank |
| Summer | 4 to 14 ft chart-limited; documented 10 to 30 ft | dawn | Deep basin (12 ft) | Drop-shot micro plastics, Small spoon tipped with worm |
| Fall | 4 to 14 ft chart-limited; documented 12 to 35 ft | midday | Deep basin (12 ft) | Jigging spoon (small), Perch rig / spreader |
| Winter | 4 to 14 ft chart-limited; documented 15 to 35 ft | midday & dawn | Deep basin (12 ft) | Tungsten jig + spikes, Rattle spoon (small) |
When the water first warms, northern pike slide up into 2 to 8 ft. By summer they slide out to 4 to 14 ft, and by winter most fish are in 4 to 14 ft. If you only fish one area, make it Shallow bay flat: a weed flat around 3 ft that scores prime in spring. In summer the feeding windows fall in early morning and the evening. Keep a bucktail or a weedless spoon over cabbage rigged through the warm months.
Depth note: when a documented seasonal range extends below this chart, the table shows the deepest mapped working water, not a verified holding depth.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 8 ft | midday & dawn | Shallow bay flat (3 ft) | #5 inline spinner, Spoon (red/white) |
| Summer | 4 to 14 ft chart-limited; documented 8 to 20 ft | dawn & dusk | Shallow bay flat (3 ft) | Bucktail, Weedless spoon over cabbage |
| Fall | 4 to 14 ft chart-limited; documented 6 to 18 ft | midday & dawn | Break off the point (6 ft) | Big rubber (Bull Dawg style), Husky-style jerkbait |
| Winter | 4 to 14 ft chart-limited; documented 5 to 15 ft | midday | Shallow bay flat (3 ft) | Tip-ups, Large jigging spoon |
When the water first warms, burbot slide up into 4 to 14 ft. There's no big seasonal slide here — summer means 4 to 14 ft, winter 4 to 14 ft. Start at Deep basin. It's a deep basin holding about 12 ft of water and rates prime come spring. The feeding windows run after dark and midday. Keep a heavy jig + cut bait rigged through the warm months.
Depth note: when a documented seasonal range extends below this chart, the table shows the deepest mapped working water, not a verified holding depth.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 4 to 14 ft chart-limited; documented 25 to 70 ft | night & dusk | Deep basin (12 ft) | Glow jigging spoon + cut bait, Rattle bait (dark) |
| Summer | 4 to 14 ft chart-limited; documented 50 to 120 ft | night & midday | Deep basin (12 ft) | Heavy jig + cut bait |
| Fall | 4 to 14 ft chart-limited; documented 30 to 80 ft | night & dusk | Deep basin (12 ft) | Glow spoon + minnow head, Blade bait (slow) |
| Winter | 4 to 14 ft chart-limited; documented 15 to 60 ft | night & dusk | Deep basin (12 ft) | Glow tungsten + cut bait, Rattle spoon + minnow head |
Start shallow in spring: lake whitefish sit in 4 to 14 ft that time of year. They don't go far with the seasons — 4 to 14 ft covers summer, 4 to 14 ft covers winter. Top water on the chart: Deep basin, a deep basin in the 12 ft range, prime in summer. Fish it in early morning and you'll meet the bite. Throw a blade bait vertical or a small jigging spoon until the fish tell you otherwise.
Depth note: when a documented seasonal range extends below this chart, the table shows the deepest mapped working water, not a verified holding depth.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 4 to 14 ft chart-limited; documented 15 to 45 ft | midday & dawn | Break off the point (6 ft) | Small jig + waxworm, Blade bait (small) |
| Summer | 4 to 14 ft chart-limited; documented 40 to 90 ft | dawn | Deep basin (12 ft) | Blade bait vertical, Small jigging spoon |
| Fall | 4 to 14 ft chart-limited; documented 8 to 30 ft | dusk | Break off the point (6 ft) | Small spoon (gold), Jig + plastic larva |
| Winter | 4 to 14 ft chart-limited; documented 25 to 70 ft | midday & dawn | Deep basin (12 ft) | Jigging spoon + bead chain, Tungsten jig + waxie |
Structure-wise the chart holds 6 features, led in depth by Deep basin at roughly 12 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 Irish Lake specifically, so confirm the current rules before you fish.
Check the official Ontario fishing regulations →
Irish Lake is about 14 ft (4 m) deep at its deepest point. The contours here are modeled from the water's real shape and maximum depth, so treat them as a rough guide.
Anglers target walleye, yellow perch, northern pike, burbot, lake whitefish on Irish Lake.
Break off the point is the top-rated area: a drop-off in about 6 ft of water that rates prime for walleye in fall. Open the map above to see every rated spot for each species and season.
For walleye, the summer bite is best in the evening and 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 Irish 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.
Valentine Lake 2 mi · Carey Lake 5 mi · Kennedy Lake 6 mi · Pike Lake 6 mi · Samuel Lake 7 mi · Penhall Lake 7 mi · West Lake 7 mi · Banks Lake 7 mi · St. Joseph Lake 8 mi · Forde Lake 8 mi · Angelina Lake 8 mi · Constance Lake 9 mi
See how Irish Lake stacks up: best walleye lakes in Ontario · best northern pike lakes in Ontario · best yellow perch lakes in Ontario · best lake whitefish lakes in Ontario
More water nearby: Cochrane District fishing maps (673 charts). Browse all Ontario fishing maps. See every water on DepthScout. 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.