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Rating depth structure for lake whitefish.
Shared by DepthScout anglers. Exact spots stay private, always.
43-acre lake in Timiskaming District, Ontario. The lake tops out around 25 ft. The depth chart comes from Ontario Ministry of Natural Resources and Forestry bathymetric survey data, so the contours are survey-derived rather than computer-modeled. Species by species, here's what the data says the year looks like.
The drawn water covers 43 acres wrapped in 1.3 miles of bank. At index 1.4 the outline is almost a bowl — read the depth changes, not the shoreline. 72% of the surface is littoral (under ~15 ft) — cover, weeds and forage water. End to end it runs roughly 0.5 mi, about 0.3 mi across. Timiskaming District claims this one. Edith Lake sits 1 mi east — the closest neighbouring chart.
Start shallow in spring: lake whitefish sit in 8 to 25 ft that time of year. They don't go far with the seasons — 8 to 25 ft covers summer, 8 to 25 ft covers winter. Top water on the chart: Deep basin, a deep basin in the 25 ft range, prime in summer. Fish it in early morning and you'll meet the bite. Throw a blade bait vertical or a small jigging spoon until the fish tell you otherwise.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 8 to 25 ft | midday & dawn | Break off the point (3 ft) | Small jig + waxworm, Blade bait (small) |
| Summer | 8 to 25 ft | dawn | Deep basin (25 ft) | Blade bait vertical, Small jigging spoon |
| Fall | 7 to 25 ft | dusk | Break off the point (3 ft) | Small spoon (gold), Jig + plastic larva |
| Winter | 8 to 25 ft | midday & dawn | Deep basin (25 ft) | Jigging spoon + bead chain, Tungsten jig + waxie |
Count 5 structure marks on this chart. The deepest, Deep basin, sits near 25 ft.
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 Diabase Lake specifically, so confirm the current rules before you fish.
Check the official Ontario fishing regulations →
Diabase Lake is about 25 ft (8 m) deep at its deepest point. The depth chart comes from Ontario Ministry of Natural Resources and Forestry bathymetric survey data, so the contours are survey-derived rather than computer-modeled.
Anglers target lake whitefish on Diabase Lake.
Deep basin is the top-rated area: a deep basin in about 25 ft of water that rates prime for lake whitefish in summer. The interactive chart above rates every spot for each species and season.
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.
Fishing on Diabase 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.
Edith Lake 1 mi · Burk Lake 1 mi · Dinny Lake 1 mi · Obushkong Lake 2 mi · Serpentine Lake 2 mi · Lett Lake 3 mi · Gorman Lake 3 mi · Davidson Lake 3 mi · Firth Lake 3 mi · North Gamble Lake 3 mi · Gowganda L. 3 mi · Milner L. 3 mi
See how Diabase Lake stacks up: best lake whitefish lakes in Ontario
More water nearby: Timiskaming District fishing maps (515 charts). Browse all Ontario fishing maps or see every water on DepthScout. Bathymetry: published agency survey data. 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.