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6-acre lake in Cochrane District, Ontario. The lake tops out around 26 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 a transect sounding survey by the Ontario MNRF. Here's the year, species by species, as the scoring engine sees it.
On the chart, Guilfoyle L. 30 draws 5 acres inside 0.5 miles of shoreline. The shoreline is moderately structured (index 1.5) — enough points and pockets to pattern. Littoral water — the productive band under ~15 ft — makes up 88% of this chart. You'll find it in Cochrane District. Closest neighbour on DepthScout: Guilfoyle Lake 27, 0 mi southwest of here.
Spring puts brook trout in skinny water — 2 to 15 ft is the zone. As the season builds they drop to 8 to 26 ft, wintering in 3 to 20 ft. Summer brook trout concentrate at Deep basin, a prime-rated deep basin around 22 ft. Warm-month bites cluster around early morning and the evening. A small spoon fished deep or a trolled lake-clear wobbler + worm covers the summer program.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 15 ft | dawn & dusk | Shallow bay flat (2 ft) | Small inline spinner (gold), Tiny spoon |
| Summer | 8 to 26 ft | dawn & dusk | Deep basin (22 ft) | Small spoon fished deep, Trolled lake-clear wobbler + worm |
| Fall | 2 to 15 ft | midday & dawn | open water | Small spoon (orange), Spinner |
| Winter | 3 to 20 ft | dawn | Shoreline break (8 ft) | Small jigging spoon, Tungsten jig + plastic |
The chart marks 3 structure features on Guilfoyle L. 30; the deepest is Deep basin at about 22 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 Guilfoyle L. 30 specifically, so confirm the current rules before you fish.
Check the official Ontario fishing regulations →
Guilfoyle L. 30 is about 26 ft (8 m) deep at its deepest point. The depth data here comes from a transect sounding survey by the Ontario MNRF.
Anglers target brook trout on Guilfoyle L. 30.
Deep basin is the top-rated area: a deep basin in about 22 ft of water that rates prime for brook trout in summer. The map above holds the full rated-spot list for every 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 Guilfoyle L. 30 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.
Guilfoyle Lake 27 0 mi · Guilfoyle L.37 1 mi · Dent L. 1 mi · Guilfoyle Lake 23 1 mi · Guilfoyle No. 43 1 mi · Guilfoyle Lake 17 2 mi · Guilfoyle Lake 44 2 mi · Guilfoyle L. 50 2 mi · Guilfoyle L. 49 2 mi · Guilfoyle Lake 2 mi · Guilfoyle Lake 11 2 mi · Bennet Lake 2 mi
See how Guilfoyle L. 30 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.