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Fishing Slate Rock Lake: what the data says
407-acre lake near Ontario. The lake tops out around 21 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. What follows comes from the same scoring engine that paints the spots above.
Lake Whitefish fishing at Slate Rock Lake
Start shallow in spring: lake whitefish sit in 6 to 21 ft that time of year. Summer fish stay in 6 to 21 ft, and winter fish hold in 6 to 21 ft. If you only fish one area, make it Deep basin: a deep basin around 18 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 | 6 to 21 ft | midday & dawn | Small jig + waxworm, Blade bait (small) |
| Summer | 6 to 21 ft | dawn | Blade bait vertical, Small jigging spoon |
| Fall | 6 to 21 ft | dusk | Small spoon (gold), Jig + plastic larva |
| Winter | 6 to 21 ft | midday & dawn | Jigging spoon + bead chain, Tungsten jig + waxie |
Walleye fishing at Slate Rock Lake
Spring walleye on Slate Rock Lake hold shallow, usually 4 to 15 ft. By summer they slide out to 6 to 21 ft, and by winter most fish are in 6 to 21 ft. Break off the point is the standout, a drop-off at roughly 9 ft, rated prime for fall walleye. Plan around the evening and early morning in the warm months. A crawler harness on bottom bouncer or a deep crankbait (trolled) covers the summer program.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 4 to 15 ft | dusk & dawn | 1/8 oz jig + minnow, Hair jig |
| Summer | 6 to 21 ft | dusk & dawn | Crawler harness on bottom bouncer, Deep crankbait (trolled) |
| Fall | 6 to 21 ft | dusk & night | Jigging rap, Jig + big minnow |
| Winter | 6 to 21 ft | dusk & dawn | Jigging spoon + minnow head, Rattle bait |
Yellow Perch fishing at Slate Rock Lake
Start shallow in spring: yellow perch sit in 3 to 12 ft that time of year. By summer they slide out to 6 to 21 ft, and by winter most fish are in 6 to 21 ft. The spot to know is Shallow bay flat, a weed flat in about 3 ft of water that rates prime for yellow perch in spring. Plan around early morning in the warm months. 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 | 6 to 21 ft | dawn | Drop-shot micro plastics, Small spoon tipped with worm |
| Fall | 6 to 21 ft | midday | Jigging spoon (small), Perch rig / spreader |
| Winter | 6 to 21 ft | midday & dawn | Tungsten jig + spikes, Rattle spoon (small) |
Northern Pike fishing at Slate Rock Lake
In spring, northern pike run shallow here, mostly 2 to 8 ft. Summer pushes them deeper, 8 to 20 ft, and winter fish settle into 5 to 15 ft. The spot to know is Shallow bay flat, a weed flat in about 3 ft of water that rates prime for northern pike in spring. Plan around early morning and the evening in the warm months. A bucktail or a weedless spoon over cabbage covers the summer program.
| 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 18 ft
- Break off the point: drop-off, around 9 ft
- Main-lake point: point, around 8 ft
- Secondary point: point, around 8 ft
- Shallow bay flat: weed flat, around 3 ft
- Back-bay flat: weed flat, around 3 ft
Common questions
How deep is Slate Rock Lake?
Slate Rock Lake is about 21 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 Slate Rock Lake?
Anglers target walleye, northern pike, yellow perch, lake whitefish on Slate Rock Lake.
Where is the best fishing spot on Slate Rock Lake?
Deep basin is the top-rated area: a deep basin in about 18 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 Slate Rock Lake?
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
Singed Tree Lake · Hoodoo Lake · Sherry Lake · Scorch Lake · Roadside Lake · Black Duck L.
See how Slate Rock Lake 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.