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136-acre lake in Algoma District, Ontario. The lake tops out around 26 ft. The depth data here comes from the Ontario MNRF survey of 2022 (an MNRF lake survey). Below is the species-by-species picture, pulled from the same data the map uses.
On the chart, Lower Island Lake draws 136 acres inside 4 miles of shoreline. That shoreline is heavily fingered (development index 2.4) — bays, points and pockets everywhere, which multiplies the fishable edge. Littoral water — the productive band under ~15 ft — makes up 85% of this chart. Figure 1.3 mi of water from one end to the other, 0.5 mi at the beam. You'll find it in Algoma District. The nearest mapped water is Upper Island Lake, 1 mi to the northeast.
Spring yellow perch on Lower Island Lake hold shallow, usually 3 to 12 ft. They move out to 8 to 26 ft in summer and finish the year down in 8 to 26 ft. Put Back-bay flat first on the milk run — a weed flat near 4 ft that grades prime for spring. The feeding windows run early morning. The summer box starts with a drop-shot micro plastics or a small spoon tipped with worm.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 12 ft | midday & dawn | Back-bay flat (4 ft) | Small jig + curly tail, Perch-pattern micro crank |
| Summer | 8 to 26 ft | dawn | Deep basin (25 ft) | Drop-shot micro plastics, Small spoon tipped with worm |
| Fall | 8 to 26 ft | midday | Deep basin (25 ft) | Jigging spoon (small), Perch rig / spreader |
| Winter | 8 to 26 ft | midday & dawn | Deep basin (25 ft) | Tungsten jig + spikes, Rattle spoon (small) |
Spring puts smallmouth bass in skinny water — 3 to 12 ft is the zone. Warm water sends them out to 8 to 26 ft; cold water stacks them in 8 to 26 ft. Secondary point is the standout, a point at roughly 8 ft, rated prime for fall smallmouth bass. Plan around early morning and the evening in the warm months. A drop shot (goby/minnow) or a ned rig covers the summer program.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 12 ft | dawn & dusk | Secondary point (8 ft) | Ned rig, Tube jig |
| Summer | 8 to 26 ft | dawn & dusk | Break off the point (11 ft) | Drop shot (goby/minnow), Ned rig |
| Fall | 8 to 25 ft | midday & dawn | Secondary point (8 ft) | Jerkbait, Blade bait |
| Winter | 8 to 26 ft | midday | Break off the point (11 ft) | Blade bait, Hair jig |
When the water first warms, rock bass slide up into 2 to 10 ft. Summer is a 5 to 20 ft game here, winter an 8 to 26 ft one. Start at Secondary point. It's a point holding about 8 ft of water and rates prime come summer. The feeding windows run the evening. Keep a ned rig (small) or a marabou jig rigged through the warm months.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 10 ft | midday & dawn | Main-lake point (2 ft) | 1/16 oz jig + grub, Small inline spinner |
| Summer | 5 to 20 ft | dusk | Secondary point (8 ft) | Ned rig (small), Marabou jig |
| Fall | 8 to 22 ft | midday | Break off the point (11 ft) | Small tube jig, Inline spinner |
| Winter | 8 to 26 ft | midday | Deep basin (25 ft) | Tungsten jig + plastic, Small spoon + spike |
The spring pattern is a shallow one: brown bullhead in 2 to 8 ft. Midsummer fish sit out in 3 to 12 ft before dropping to 10 to 25 ft for winter. The spot to know is Deep basin, a deep basin in about 25 ft of water that rates prime for brown bullhead in winter. Plan around after dark and the evening in the warm months.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 8 ft | dusk & night | Shallow bay flat (2 ft) | |
| Summer | 3 to 12 ft | night & dusk | Back-bay flat (4 ft) | |
| Fall | 5 to 15 ft | dusk | Back-bay flat (4 ft) | |
| Winter | 10 to 25 ft | midday | Deep basin (25 ft) |
The chart marks 8 structure features on Lower Island Lake; the deepest is Deep basin at about 25 ft.
Access data: Land Information Ontario — Fishing Access Point. Confirm conditions and fees locally before you launch.
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 Lower Island Lake specifically, so confirm the current rules before you fish.
Check the official Ontario fishing regulations →
Lower Island Lake is about 26 ft (8 m) deep at its deepest point. The depth data here comes from the Ontario MNRF survey of 2022 (an MNRF lake survey).
Anglers target yellow perch, smallmouth bass, rock bass, brown bullhead on Lower Island Lake.
Back-bay flat is the top-rated area: a weed flat in about 4 ft of water that rates prime for yellow perch in spring. Open the map above to see every rated spot for each species and season.
For yellow perch, 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 Lower Island 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.
Upper Island Lake 1 mi · Finn Lake 1 mi · Heyden Lake 2 mi · Redrock Lake 2 mi · Maki Lake 2 mi · Lake One 3 mi · Trout Lake 3 mi · Legge Lake 3 mi · Fillion L. 3 mi · St. Joe Lake 4 mi · Crystal Lake 4 mi · Kaufman Lake 4 mi
See how Lower Island Lake stacks up: best smallmouth bass lakes in Ontario · best yellow perch lakes in Ontario · best rock bass lakes in Ontario · best brown bullhead 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.