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Rating depth structure for brook trout.
Shared by DepthScout anglers. Exact spots stay private, always.
6,846-acre lake in Kenora District, Ontario. The lake tops out around 33 ft. The depth data here comes from a transect sounding survey by the Ontario MNRF. The season-by-season read for each species follows, from the map's own numbers.
Drawn out, this is 6,877 acres of water rimmed by 21.1 miles of bank. The shoreline is moderately structured (index 1.8) — enough points and pockets to pattern. 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 8.4 mi with a 2.4-mi widest point. The water lies in Kenora District. For a second option, Opinnagau Lake lies 12 mi west.
In spring, brook trout run shallow here, mostly 2 to 15 ft. Midsummer fish sit out in 10 to 30 ft before dropping to 3 to 20 ft for winter. Summer brook trout concentrate at Deep basin, a prime-rated deep basin around 30 ft. Fish it in early morning and the evening and you'll meet the bite. You won't need more than a small spoon fished deep or a trolled lake-clear wobbler + worm most summer days.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 15 ft | dawn & dusk | Main-lake point (4 ft) | Small inline spinner (gold), Tiny spoon |
| Summer | 10 to 30 ft | dawn & dusk | Deep basin (30 ft) | Small spoon fished deep, Trolled lake-clear wobbler + worm |
| Fall | 2 to 15 ft | midday & dawn | Main-lake point (4 ft) | Small spoon (orange), Spinner |
| Winter | 3 to 20 ft | dawn | Break off the point (7 ft) | Small jigging spoon, Tungsten jig + plastic |
Opinnagua River carries 11 mapped structure features, topping out (or rather bottoming out) at Deep basin, about 30 ft down.
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 Opinnagua River specifically, so confirm the current rules before you fish.
Check the official Ontario fishing regulations →
Opinnagua River is about 33 ft (10 m) deep at its deepest point. The depth data here comes from a transect sounding survey by the Ontario MNRF.
Anglers target brook trout on Opinnagua River.
Deep basin is the top-rated area: a deep basin in about 30 ft of water that rates prime for brook trout in summer. Open the map above to see every rated spot for each species and season.
For brook trout, the summer bite is best in early morning and the evening. Each species page section below lists the seasonal windows, and the map shows a live NOW badge when you're inside one.
Fishing on Opinnagua River 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.
Opinnagau Lake 12 mi · Aquatuk Lake 35 mi · Sutton Lake 36 mi · Pine Lake 39 mi · Hawley Lake 47 mi · Spruce Lake 47 mi · North Washagami Lake 55 mi · Shamattawa Lake 67 mi · Wild Berry Lake 88 mi · McFaulds Lake 113 mi · Missisa Lake 120 mi · Winisk Lake 135 mi
See how Opinnagua River stacks up: best brook trout 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.