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163-acre lake in Algoma District, Ontario. The lake tops out around 66 ft. The depth data here comes from a transect sounding survey by the Ontario MNRF. Every species below gets its seasonal read from the same numbers driving the chart.
River Lake maps at 164 acres behind 5.8 miles of shoreline. An index of 3.3 puts the bank firmly in maze territory: point after pocket after cove, every one a casting target. The shallow band under 15 ft claims about 43% of the surface — that's where the groceries are. Call it 2 mi long by 0.5 mi wide at the broadest reach. Algoma District claims this one. Its nearest charted neighbour, McDouall Lake, is 2 mi to the southwest.
Spring brook trout on River Lake hold shallow, usually 2 to 15 ft. They move out to 10 to 30 ft in summer and finish the year down in 3 to 20 ft. Put Break off the point first on the milk run — a drop-off near 11 ft that grades prime for summer. The feeding windows run early morning and the evening. The summer box starts with a small spoon fished deep or a trolled lake-clear wobbler + worm.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 15 ft | dawn & dusk | Main-lake point (6 ft) | Small inline spinner (gold), Tiny spoon |
| Summer | 10 to 30 ft | dawn & dusk | Break off the point (11 ft) | Small spoon fished deep, Trolled lake-clear wobbler + worm |
| Fall | 2 to 15 ft | midday & dawn | Main-lake point (6 ft) | Small spoon (orange), Spinner |
| Winter | 3 to 20 ft | dawn | Break off the point (11 ft) | Small jigging spoon, Tungsten jig + plastic |
Come spring, look for lake trout tight to the bank in 10 to 40 ft. They move out to 20 to 66 ft in summer and finish the year down in 17 to 66 ft. If you only fish one area, make it Deep basin: a deep basin around 64 ft that scores prime in summer. Best bite is early morning. A white tube jig (deep) or a magnum spoon on downrigger is the honest summer answer here.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 10 to 40 ft | dawn & dusk | Secondary point (14 ft) | Casting spoon over shoals, Jerkbait (shallow) |
| Summer | 20 to 66 ft | dawn | Deep basin (64 ft) | White tube jig (deep), Magnum spoon on downrigger |
| Fall | 10 to 50 ft | dusk & dawn | Secondary point (14 ft) | Heavy casting spoon, Jigging rap over reefs |
| Winter | 17 to 66 ft | dawn | Deep basin (64 ft) | White tube jig, Airplane jig |
Structure-wise the chart holds 6 features, led in depth by Deep basin at roughly 64 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 River Lake specifically, so confirm the current rules before you fish.
Check the official Ontario fishing regulations →
River Lake is about 66 ft (20 m) deep at its deepest point. The depth data here comes from a transect sounding survey by the Ontario MNRF.
Anglers target brook trout, lake trout on River Lake.
Deep basin is the top-rated area: a deep basin in about 64 ft of water that rates prime for lake trout in summer. The map above holds the full rated-spot list for every 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 River 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.
McDouall Lake 2 mi · Loon Lake 2 mi · Bierce Lake 2 mi · Location Lake 2 mi · Kelsie Lake 3 mi · Cedar L. 3 mi · Little Cedar Lake 3 mi · Runaway L. 3 mi · Cedar Lake 3 mi · Toobee Lake 4 mi · Gibby L. 4 mi · Goodlookin Lake 4 mi
See how River Lake stacks up: best lake trout lakes in Ontario · best brook trout lakes in Ontario
More water nearby: Algoma District fishing maps (1026 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.