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Fishing Foucault L. 42: what the data says
171-acre lake near Ontario. The lake tops out around 49 ft. The contours are modeled from the water's real shoreline and maximum depth. Treat them as a rough guide, and never use them for navigation. Here is how the season plays out for each species, straight from the data behind the map.
Lake Trout fishing at Foucault L. 42
In spring, lake trout run shallow here, mostly 10 to 40 ft. Summer pushes them deeper, 15 to 49 ft, and winter fish settle into 12 to 49 ft. The spot to know is Deep basin, a deep basin in about 42 ft of water that rates prime for lake trout in summer. In summer the feeding windows fall in early morning. Tie on a white tube jig (deep) or a magnum spoon on downrigger and you're in the game.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 10 to 40 ft | dawn & dusk | Casting spoon over shoals, Jerkbait (shallow) |
| Summer | 15 to 49 ft | dawn | White tube jig (deep), Magnum spoon on downrigger |
| Fall | 10 to 49 ft | dusk & dawn | Heavy casting spoon, Jigging rap over reefs |
| Winter | 12 to 49 ft | dawn | White tube jig, Airplane jig |
Lake Whitefish fishing at Foucault L. 42
Spring lake whitefish on Foucault L. 42 hold shallow, usually 15 to 45 ft. By summer they slide out to 15 to 49 ft, and by winter most fish are in 15 to 49 ft. Deep basin is the standout, a deep basin at roughly 42 ft, rated prime for summer lake whitefish. Plan around early morning in the warm months. A blade bait vertical or a small jigging spoon covers the summer program.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 15 to 45 ft | midday & dawn | Small jig + waxworm, Blade bait (small) |
| Summer | 15 to 49 ft | dawn | Blade bait vertical, Small jigging spoon |
| Fall | 8 to 30 ft | dusk | Small spoon (gold), Jig + plastic larva |
| Winter | 15 to 49 ft | midday & dawn | Jigging spoon + bead chain, Tungsten jig + waxie |
Yellow Perch fishing at Foucault L. 42
Start shallow in spring: yellow perch sit in 3 to 12 ft that time of year. They move out to 10 to 30 ft in summer and finish the year down in 15 to 35 ft. If you only fish one area, make it Shallow bay flat: a weed flat around 6 ft that scores prime in spring. Plan around early morning in the warm months. Tie on a drop-shot micro plastics or a small spoon tipped with worm and you're in the game.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 3 to 12 ft | midday & dawn | Small jig + curly tail, Perch-pattern micro crank |
| Summer | 10 to 30 ft | dawn | Drop-shot micro plastics, Small spoon tipped with worm |
| Fall | 12 to 35 ft | midday | Jigging spoon (small), Perch rig / spreader |
| Winter | 15 to 35 ft | midday & dawn | Tungsten jig + spikes, Rattle spoon (small) |
Notable structure
- Deep basin: deep basin, around 42 ft
- Break off the point: drop-off, around 22 ft
- Main-lake point: point, around 12 ft
- Secondary point: point, around 12 ft
- Shallow bay flat: weed flat, around 6 ft
- Back-bay flat: weed flat, around 6 ft
Common questions
How deep is Foucault L. 42?
Foucault L. 42 is about 49 ft at its deepest point. The contours here are modeled from the water's real shape and maximum depth, so treat them as a rough guide.
What fish are in Foucault L. 42?
Anglers target yellow perch, lake trout, lake whitefish on Foucault L. 42.
Where is the best fishing spot on Foucault L. 42?
Deep basin is the top-rated area: a deep basin in about 42 ft of water that rates prime for lake trout in summer. Open the map above to see every rated spot for each species and season.
When is the best time to fish Foucault L. 42?
For lake trout, 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.
Nearby waters
Lidstone Lake · Big Trout L. · Monestime L. 5 · Lac aux Sables · Little Trout Lake · Little Beaver Lake
See how Foucault L. 42 stacks up: best yellow perch lakes in Ontario · best lake trout lakes in Ontario · best lake whitefish lakes in Ontario
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