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244-acre lake in Cochrane District, Ontario. The lake tops out around 12 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. The depth data here comes from the Ontario MNRF survey of 1975, a decades-old survey (an MNRF lake survey). The rest of this page walks each species through its year, using the map's own scoring.
T-Bone L. maps at 244 acres behind 7.4 miles of shoreline, broken up by an island. With a shoreline index of 3.4, this water is all arms and coves — edge habitat well beyond its acreage. There is no deep basin to speak of — the entire surface is under ~15 ft, prime weed water end to end. Figure 1.9 mi of water from one end to the other, 1.2 mi at the beam. Cochrane District claims this one. Its nearest charted neighbour, Sangster Lake, is 2 mi to the northeast.
In spring, walleye run shallow here, mostly 3 to 12 ft. Summer keeps them at 4 to 12 ft, and they winter in 4 to 12 ft. Deep basin is the standout, a deep basin at roughly 5 ft, rated prime for winter walleye. Time it for the evening and early morning. You won't need more than a crawler harness on bottom bouncer or a deep crankbait (trolled) most summer days.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 12 ft | dusk & dawn | Secondary point (2 ft) | 1/8 oz jig + minnow, Hair jig |
| Summer | 4 to 12 ft | dusk & dawn | Deep basin (5 ft) | Crawler harness on bottom bouncer, Deep crankbait (trolled) |
| Fall | 4 to 12 ft | dusk & night | Deep basin (5 ft) | Jigging rap, Jig + big minnow |
| Winter | 4 to 12 ft | dusk & dawn | Deep basin (5 ft) | Jigging spoon + minnow head, Rattle bait |
The spring pattern is a shallow one: yellow perch in 3 to 12 ft. The depth story barely changes: 4 to 12 ft through summer, 4 to 12 ft in winter. Top water on the chart: Deep basin, a deep basin in the 5 ft range, prime in fall. Time it for early morning. Summer baits: a drop-shot micro plastics or a small spoon tipped with worm gets it done.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 12 ft | midday & dawn | Shallow bay flat (1 ft) | Small jig + curly tail, Perch-pattern micro crank |
| Summer | 4 to 12 ft | dawn | Deep basin (5 ft) | Drop-shot micro plastics, Small spoon tipped with worm |
| Fall | 4 to 12 ft | midday | Deep basin (5 ft) | Jigging spoon (small), Perch rig / spreader |
| Winter | 4 to 12 ft | midday & dawn | Deep basin (5 ft) | Tungsten jig + spikes, Rattle spoon (small) |
When the water first warms, northern pike slide up into 2 to 8 ft. By summer they slide out to 4 to 12 ft, and by winter most fish are in 4 to 12 ft. If you only fish one area, make it Shallow bay flat: a weed flat around 1 ft that scores prime in spring. In summer the feeding windows fall in early morning and the evening. Keep a bucktail or a weedless spoon over cabbage rigged through the warm months.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 8 ft | midday & dawn | Shallow bay flat (1 ft) | #5 inline spinner, Spoon (red/white) |
| Summer | 4 to 12 ft | dawn & dusk | Shallow bay flat (1 ft) | Bucktail, Weedless spoon over cabbage |
| Fall | 4 to 12 ft | midday & dawn | Deep basin (5 ft) | Big rubber (Bull Dawg style), Husky-style jerkbait |
| Winter | 4 to 12 ft | midday | Shallow bay flat (1 ft) | Tip-ups, Large jigging spoon |
6 pieces of structure are mapped here — Deep basin, around 5 ft, is the deepest of them.
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 T-Bone L. specifically, so confirm the current rules before you fish.
Check the official Ontario fishing regulations →
T-Bone L. is about 12 ft (4 m) deep at its deepest point. The depth data here comes from the Ontario MNRF survey of 1975, a decades-old survey (an MNRF lake survey).
Anglers target walleye, yellow perch, northern pike on T-Bone L..
Deep basin is the top-rated area: a deep basin in about 5 ft of water that rates prime for walleye in winter. The interactive chart above rates every spot for each species and season.
For walleye, the summer bite is best in the evening and 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 T-Bone L. 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.
Sangster Lake 2 mi · Potter L. 1 4 mi · Potter Lake 4 mi · Chin Lake 6 mi · Long Lake 7 mi · Humestone Lake 7 mi · Zinger Lake 8 mi · Little Abitibi Lake 8 mi · Lac La France 9 mi · Picker Lake 9 mi · Black Lake 9 mi · Williston Lake 10 mi
See how T-Bone L. stacks up: best walleye lakes in Ontario · best northern pike lakes in Ontario · best yellow perch lakes in Ontario
More water nearby: Cochrane District fishing maps (673 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.