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Fishing Flat L.: what the data says
46-acre lake near Ontario. The lake tops out around 33 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. Below is the species-by-species picture, pulled from the same data the map uses.
Lake Whitefish fishing at Flat L.
Spring lake whitefish on Flat L. hold shallow, usually 10 to 33 ft. Summer fish stay in 10 to 33 ft, and winter fish hold in 10 to 33 ft. If you only fish one area, make it Deep basin: a deep basin around 28 ft that scores prime in summer. In summer the feeding windows fall in early morning. A blade bait vertical or a small jigging spoon covers the summer program.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 10 to 33 ft | midday & dawn | Small jig + waxworm, Blade bait (small) |
| Summer | 10 to 33 ft | dawn | Blade bait vertical, Small jigging spoon |
| Fall | 8 to 30 ft | dusk | Small spoon (gold), Jig + plastic larva |
| Winter | 10 to 33 ft | midday & dawn | Jigging spoon + bead chain, Tungsten jig + waxie |
Walleye fishing at Flat L.
Start shallow in spring: walleye sit in 4 to 15 ft that time of year. By summer they slide out to 10 to 33 ft, and by winter most fish are in 10 to 33 ft. If you only fish one area, make it Break off the point: a drop-off around 15 ft that scores prime in fall. In summer the feeding windows fall in the evening and early morning. Summer baits: a crawler harness on bottom bouncer or a deep crankbait (trolled) gets it done.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 4 to 15 ft | dusk & dawn | 1/8 oz jig + minnow, Hair jig |
| Summer | 10 to 33 ft | dusk & dawn | Crawler harness on bottom bouncer, Deep crankbait (trolled) |
| Fall | 10 to 33 ft | dusk & night | Jigging rap, Jig + big minnow |
| Winter | 10 to 33 ft | dusk & dawn | Jigging spoon + minnow head, Rattle bait |
Yellow Perch fishing at Flat L.
Spring yellow perch on Flat L. hold shallow, usually 3 to 12 ft. Summer pushes them deeper, 10 to 30 ft, and winter fish settle into 10 to 33 ft. The spot to know is Shallow bay flat, a weed flat in about 4 ft of water that rates prime for yellow perch in spring. Best bite is early morning. Summer baits: a drop-shot micro plastics or a small spoon tipped with worm gets it done.
| 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 | 10 to 33 ft | midday | Jigging spoon (small), Perch rig / spreader |
| Winter | 10 to 33 ft | midday & dawn | Tungsten jig + spikes, Rattle spoon (small) |
Northern Pike fishing at Flat L.
Spring northern pike on Flat L. hold shallow, usually 2 to 8 ft. They move out to 8 to 20 ft in summer and finish the year down in 5 to 15 ft. If you only fish one area, make it Shallow bay flat: a weed flat around 4 ft that scores prime in spring. Best bite is early morning and the evening. Summer baits: a bucktail or a weedless spoon over cabbage gets it done.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 2 to 8 ft | midday & dawn | #5 inline spinner, Spoon (red/white) |
| Summer | 8 to 20 ft | dawn & dusk | Bucktail, Weedless spoon over cabbage |
| Fall | 6 to 18 ft | midday & dawn | Big rubber (Bull Dawg style), Husky-style jerkbait |
| Winter | 5 to 15 ft | midday | Tip-ups, Large jigging spoon |
Notable structure
- Deep basin: deep basin, around 28 ft
- Break off the point: drop-off, around 15 ft
- Main-lake point: point, around 8 ft
- Shallow bay flat: weed flat, around 4 ft
- Back-bay flat: weed flat, around 4 ft
Common questions
How deep is Flat L.?
Flat L. is about 33 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 Flat L.?
Anglers target walleye, northern pike, yellow perch, lake whitefish on Flat L..
Where is the best fishing spot on Flat L.?
Deep basin is the top-rated area: a deep basin in about 28 ft of water that rates prime for lake whitefish in summer. Open the map above to see every rated spot for each species and season.
When is the best time to fish Flat L.?
For lake whitefish, 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
Beaudin Lake · Ashley Lake · Powell Lake · Deak Lake · Argyle L. 31 · Argyle Lake
See how Flat L. stacks up: best walleye lakes in Ontario · best northern pike lakes in Ontario · best yellow perch lakes in Ontario · best lake whitefish lakes in Ontario
Browse all Ontario fishing maps or every water on DepthScout. How we build these maps. For fishing guidance only, never navigation.