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1,071-acre lake in Algoma District, Ontario. The lake tops out around 150 ft. The depth data here comes from the Ontario MNRF survey of 1966, a decades-old survey (a transect sounding survey). Every species below gets its seasonal read from the same numbers driving the chart.
The drawn water covers 1,076 acres wrapped in 25.3 miles of bank, broken up by 23 islands. With a shoreline index of 5.5, this water is all arms and coves — edge habitat well beyond its acreage. The shallow band under 15 ft claims about 21% of the surface — that's where the groceries are. The basin spans about 2.9 mi end to end and 2 mi across at its widest. Algoma District claims this one. Its nearest charted neighbour, Topsy Lake, is 2 mi to the southeast.
Come spring, look for brook trout tight to the bank in 2 to 15 ft. They move out to 10 to 30 ft in summer and finish the year down in 3 to 20 ft. If you only fish one area, make it Shallow bay flat: a weed flat around 7 ft that scores good in spring. Best bite is early morning and the evening. A small spoon fished deep or a trolled lake-clear wobbler + worm is the honest summer answer here.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 15 ft | dawn & dusk | Shallow bay flat (7 ft) | Small inline spinner (gold), Tiny spoon |
| Summer | 10 to 30 ft | dawn & dusk | open water | Small spoon fished deep, Trolled lake-clear wobbler + worm |
| Fall | 2 to 15 ft | midday & dawn | Secondary point (18 ft) | Small spoon (orange), Spinner |
| Winter | 3 to 20 ft | dawn | Shallow bay flat (7 ft) | Small jigging spoon, Tungsten jig + plastic |
Spring lake trout on Horner Lake hold shallow, usually 10 to 40 ft. They move out to 50 to 120 ft in summer and finish the year down in 20 to 80 ft. Put Main-lake point first on the milk run — a point near 23 ft that grades prime for spring. The feeding windows run early morning. The summer box starts with a white tube jig (deep) or a magnum spoon on downrigger.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 10 to 40 ft | dawn & dusk | Main-lake point (23 ft) | Casting spoon over shoals, Jerkbait (shallow) |
| Summer | 50 to 120 ft | dawn | Break off the point (62 ft) | White tube jig (deep), Magnum spoon on downrigger |
| Fall | 10 to 50 ft | dusk & dawn | Main-lake point (23 ft) | Heavy casting spoon, Jigging rap over reefs |
| Winter | 20 to 80 ft | dawn | Break off the point (62 ft) | White tube jig, Airplane jig |
In spring, yellow perch run shallow here, mostly 3 to 12 ft. Summer pushes them deeper, 10 to 30 ft, and winter fish settle into 15 to 35 ft. Shallow bay flat is the standout, a weed flat at roughly 7 ft, rated prime for spring yellow perch. Time it for early morning. You won't need more than a drop-shot micro plastics or a small spoon tipped with worm most summer days.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 12 ft | midday & dawn | Shallow bay flat (7 ft) | Small jig + curly tail, Perch-pattern micro crank |
| Summer | 10 to 30 ft | dawn | Back-bay flat (8 ft) | Drop-shot micro plastics, Small spoon tipped with worm |
| Fall | 12 to 35 ft | midday | Deep basin (150 ft) | Jigging spoon (small), Perch rig / spreader |
| Winter | 15 to 35 ft | midday & dawn | Deep basin (150 ft) | Tungsten jig + spikes, Rattle spoon (small) |
Structure-wise the chart holds 7 features, led in depth by Deep basin at roughly 150 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 Horner Lake specifically, so confirm the current rules before you fish.
Check the official Ontario fishing regulations →
Horner Lake is about 150 ft (46 m) deep at its deepest point. The depth data here comes from the Ontario MNRF survey of 1966, a decades-old survey (a transect sounding survey).
Anglers target brook trout, lake trout, yellow perch on Horner Lake.
Shallow bay flat is the top-rated area: a weed flat in about 7 ft of water that rates prime for yellow perch in spring. Scroll up to the map for the complete spot list by 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 Horner 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.
Topsy Lake 2 mi · Primeau Lake 2 mi · Birch Lake 2 mi · Conacher Lake 3 mi · Lucille Lake 3 mi · Davieaux Lake 3 mi · Tee Lake 4 mi · Pine Island Lake 4 mi · Darragh Lake 5 mi · Carpenter Lake 5 mi · Fish Lake 5 mi · Bijou Lake 5 mi
See how Horner Lake stacks up: best yellow perch lakes in Ontario · 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.