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Fishing Diabase Lake: what the data says
125-acre lake near Ontario. The lake tops out around 72 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 Trout fishing at Diabase Lake
Spring lake trout on Diabase Lake hold shallow, usually 10 to 40 ft. By summer they slide out to 22 to 72 ft, and by winter most fish are in 18 to 72 ft. Deep basin is the standout, a deep basin at roughly 61 ft, rated prime for summer lake trout. Plan around early morning in the warm months. A white tube jig (deep) or a magnum spoon on downrigger covers the summer program.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 10 to 40 ft | dawn & dusk | Casting spoon over shoals, Jerkbait (shallow) |
| Summer | 22 to 72 ft | dawn | White tube jig (deep), Magnum spoon on downrigger |
| Fall | 10 to 50 ft | dusk & dawn | Heavy casting spoon, Jigging rap over reefs |
| Winter | 18 to 72 ft | dawn | White tube jig, Airplane jig |
Rock Bass fishing at Diabase Lake
In spring, rock bass run shallow here, mostly 2 to 10 ft. They move out to 5 to 20 ft in summer and finish the year down in 12 to 30 ft. Main-lake point is the standout, a point at roughly 18 ft, rated prime for summer rock bass. Plan around the evening in the warm months. Tie on a ned rig (small) or a marabou jig and you're in the game.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 2 to 10 ft | midday & dawn | 1/16 oz jig + grub, Small inline spinner |
| Summer | 5 to 20 ft | dusk | Ned rig (small), Marabou jig |
| Fall | 8 to 22 ft | midday | Small tube jig, Inline spinner |
| Winter | 12 to 30 ft | midday | Tungsten jig + plastic, Small spoon + spike |
Notable structure
- Deep basin: deep basin, around 61 ft
- Break off the point: drop-off, around 32 ft
- Main-lake point: point, around 18 ft
- Secondary point: point, around 18 ft
- Shallow bay flat: weed flat, around 6 ft
- Back-bay flat: weed flat, around 6 ft
Common questions
How deep is Diabase Lake?
Diabase Lake is about 72 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 Diabase Lake?
Anglers target lake trout, rock bass on Diabase Lake.
Where is the best fishing spot on Diabase Lake?
Deep basin is the top-rated area: a deep basin in about 61 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 Diabase Lake?
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
Whitewater Lake · Shallow Lake · Little Eagle Lake · Eagle Lake · McLean Lake · Turner Lake
See how Diabase Lake stacks up: best lake trout lakes in Ontario · best rock bass lakes in Ontario
Browse all Ontario fishing maps or every water on DepthScout. How we build these maps. For fishing guidance only, never navigation.