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25-acre lake in Cochrane District, Ontario. The lake tops out around 71 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 1982 (a transect sounding survey). Every species below gets its seasonal read from the same numbers driving the chart.
The outline encloses 24 acres, worked by 1.6 miles of shoreline. That shoreline is heavily fingered (development index 2.3) — bays, points and pockets everywhere, which multiplies the fishable edge. Roughly 45% of the water is 15 ft or less, the band where the food chain lives. End to end it runs roughly 0.5 mi, about 0.2 mi across. It sits in Cochrane District. Boyle 11 L. sits 0 mi west — the closest neighbouring chart.
When the water first warms, brook trout slide up into 2 to 15 ft. By summer they slide out to 10 to 30 ft, and by winter most fish are in 3 to 20 ft. If you only fish one area, make it Main-lake point: a point around 7 ft that scores prime in spring. In summer the feeding windows fall in early morning and the evening. Keep a small spoon fished deep or a trolled lake-clear wobbler + worm rigged through the warm months.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 15 ft | dawn & dusk | Main-lake point (7 ft) | Small inline spinner (gold), Tiny spoon |
| Summer | 10 to 30 ft | dawn & dusk | Break off the point (4 ft) | Small spoon fished deep, Trolled lake-clear wobbler + worm |
| Fall | 2 to 15 ft | midday & dawn | Main-lake point (7 ft) | Small spoon (orange), Spinner |
| Winter | 3 to 20 ft | dawn | Break off the point (4 ft) | Small jigging spoon, Tungsten jig + plastic |
5 pieces of structure are mapped here — Deep basin, around 63 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 Boyle 10 L. specifically, so confirm the current rules before you fish.
Check the official Ontario fishing regulations →
Boyle 10 L. is about 71 ft (22 m) deep at its deepest point. The depth data here comes from the Ontario MNRF survey of 1982 (a transect sounding survey).
Anglers target brook trout on Boyle 10 L..
Main-lake point is the top-rated area: a point in about 7 ft of water that rates prime for brook trout in spring. The interactive chart above rates every spot for each species and season.
For brook trout, the summer bite is best in early morning and the evening. Each species page section below lists the seasonal windows, and the map shows a live NOW badge when you're inside one.
Fishing on Boyle 10 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.
Boyle 11 L. 0 mi · Boyle 12 L. 0 mi · Boyle 8 Lake 1 mi · Guilfoyle No. 69 2 mi · Guilfoyle Lake 64 2 mi · Guilfoyle No. 87 4 mi · Boyle Lake 36 4 mi · Bennet Lake 4 mi · Guilfoyle L. 50 4 mi · Guilfoyle Lake 44 4 mi · Guilfoyle L. 49 4 mi · Guilfoyle L. 94 5 mi
See how Boyle 10 L. stacks up: best brook trout 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.