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14,402-acre lake in Kenora District, Ontario. The lake tops out around 13 ft. The depth data here comes from a transect sounding survey by the Ontario MNRF. Below is the species-by-species picture, pulled from the same data the map uses.
The outline encloses 14,467 acres, worked by 33.9 miles of shoreline, with a single island in the mix. A middling shoreline index (2) gives it some bays to work without being a maze. There is no deep basin to speak of — the entire surface is under ~15 ft, prime weed water end to end. Tip to tip the water measures near 11.1 mi with a 4.5-mi widest point. It sits in Kenora District. Opinnagua River sits 12 mi east — the closest neighbouring chart.
In spring, lake whitefish run shallow here, mostly 4 to 13 ft. Summer keeps them at 4 to 13 ft, and they winter in 4 to 13 ft. Deep basin is the standout, a deep basin at roughly 13 ft, rated prime for summer lake whitefish. Time it for early morning. You won't need more than a blade bait vertical or a small jigging spoon most summer days.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 4 to 13 ft | midday & dawn | Break off the point (13 ft) | Small jig + waxworm, Blade bait (small) |
| Summer | 4 to 13 ft | dawn | Deep basin (13 ft) | Blade bait vertical, Small jigging spoon |
| Fall | 3 to 13 ft | dusk | Gravel shoal (2 ft) | Small spoon (gold), Jig + plastic larva |
| Winter | 4 to 13 ft | midday & dawn | Deep basin (13 ft) | Jigging spoon + bead chain, Tungsten jig + waxie |
In spring, cisco (lake herring) run shallow here, mostly 3 to 13 ft. Summer keeps them at 4 to 13 ft, and they winter in 4 to 13 ft. Deep basin is the standout, a deep basin at roughly 13 ft, rated prime for spring cisco (lake herring). Time it for early morning. You won't need more than a vertical flutter spoon (small) or a drop-shot micro plastic most summer days.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 13 ft | dawn & dusk | Deep basin (13 ft) | Small silver spoon, Tiny swim jig (white) |
| Summer | 4 to 13 ft | dawn | Deep basin (13 ft) | Vertical flutter spoon (small), Drop-shot micro plastic |
| Fall | 3 to 13 ft | dusk & dawn | Gravel shoal (2 ft) | Small casting spoon, Inline spinner (silver) |
| Winter | 4 to 13 ft | dawn | Deep basin (13 ft) | Small jigging spoon (glow/silver), Tungsten jig + minnow head |
The spring pattern is a shallow one: walleye in 3 to 13 ft. The depth story barely changes: 4 to 13 ft through summer, 4 to 13 ft in winter. The spot to know is Break off the point, a drop-off in about 13 ft of water that rates prime for walleye in fall. Plan around the evening and early morning in the warm months. Summer baits: a crawler harness on bottom bouncer or a deep crankbait (trolled) gets it done.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 13 ft | dusk & dawn | Gravel shoal (2 ft) | 1/8 oz jig + minnow, Hair jig |
| Summer | 4 to 13 ft | dusk & dawn | Break off the point (13 ft) | Crawler harness on bottom bouncer, Deep crankbait (trolled) |
| Fall | 4 to 13 ft | dusk & night | Break off the point (13 ft) | Jigging rap, Jig + big minnow |
| Winter | 4 to 13 ft | dusk & dawn | Deep basin (13 ft) | Jigging spoon + minnow head, Rattle bait |
Early season northern pike use the shallows, holding in 2 to 8 ft. Summer is a 4 to 13 ft game here, winter a 4 to 13 ft one. The chart's best answer is Shallow bay flat — weed flat, 3 ft, prime for spring. Best bite is early morning and the evening. Tie on a bucktail or a weedless spoon over cabbage and you're in the game.
| 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 13 ft | dawn & dusk | Break off the point (13 ft) | Bucktail, Weedless spoon over cabbage |
| Fall | 4 to 13 ft | midday & dawn | Break off the point (13 ft) | Big rubber (Bull Dawg style), Husky-style jerkbait |
| Winter | 4 to 13 ft | midday | Shallow bay flat (3 ft) | Tip-ups, Large jigging spoon |
The chart marks 11 structure features on Opinnagau 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 Opinnagau Lake specifically, so confirm the current rules before you fish.
Check the official Ontario fishing regulations →
Opinnagau Lake is about 13 ft (4 m) deep at its deepest point. The depth data here comes from a transect sounding survey by the Ontario MNRF.
Anglers target lake whitefish, cisco (lake herring), walleye, northern pike on Opinnagau Lake.
Deep basin is the top-rated area: a deep basin in about 13 ft of water that rates prime for lake whitefish in summer. The map above holds the full rated-spot list for every 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 Opinnagau 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.
Opinnagua River 12 mi · Pine Lake 28 mi · Sutton Lake 28 mi · Aquatuk Lake 31 mi · Spruce Lake 39 mi · Hawley Lake 42 mi · North Washagami Lake 48 mi · Shamattawa Lake 56 mi · Wild Berry Lake 76 mi · McFaulds Lake 105 mi · Missisa Lake 115 mi · Winisk Lake 123 mi
See how Opinnagau Lake stacks up: best walleye lakes in Ontario · best northern pike lakes in Ontario · best lake whitefish lakes in Ontario · best cisco (lake herring) lakes in Ontario
More water nearby: Kenora District fishing maps (1173 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.