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5-acre lake in Cochrane District, Ontario. The lake tops out around 17 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 1973, a decades-old survey (a transect sounding survey). The season-by-season read for each species follows, from the map's own numbers.
On the chart, Bullfrog Lake draws 4 acres inside 0.3 miles of shoreline. The basin is a simple one (shoreline index 1.2) — close to a bowl, so the structure on the chart matters more than the bank. The water lies in Cochrane District. For a second option, Irrigation Lake lies 0 mi north.
Spring puts brook trout in skinny water — 2 to 15 ft is the zone. Warm water sends them out to 5 to 17 ft; cold water stacks them in 3 to 17 ft. Deep basin is the standout, a deep basin at roughly 14 ft, rated prime for summer brook trout. Plan around early morning and the evening in the warm months. 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 (5 ft) | Small inline spinner (gold), Tiny spoon |
| Summer | 5 to 17 ft | dawn & dusk | Deep basin (14 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 17 ft | dawn | Deep basin (14 ft) | Small jigging spoon, Tungsten jig + plastic |
The spring pattern is a shallow one: northern pike in 2 to 8 ft. As the season builds they drop to 5 to 17 ft, wintering in 5 to 15 ft. Top water on the chart: Shallow bay flat, a weed flat in the 5 ft range, prime in spring. Time it for early morning and the evening. Summer baits: a bucktail or a weedless spoon over cabbage gets it done.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 8 ft | midday & dawn | Shallow bay flat (5 ft) | #5 inline spinner, Spoon (red/white) |
| Summer | 5 to 17 ft | dawn & dusk | Shallow bay flat (5 ft) | Bucktail, Weedless spoon over cabbage |
| Fall | 5 to 17 ft | midday & dawn | Shallow bay flat (5 ft) | Big rubber (Bull Dawg style), Husky-style jerkbait |
| Winter | 5 to 15 ft | midday | Shallow bay flat (5 ft) | Tip-ups, Large jigging spoon |
The chart marks 3 structure features on Bullfrog Lake; the deepest is Deep basin at about 14 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 Bullfrog Lake specifically, so confirm the current rules before you fish.
Check the official Ontario fishing regulations →
Bullfrog Lake is about 17 ft (5 m) deep at its deepest point. The depth data here comes from the Ontario MNRF survey of 1973, a decades-old survey (a transect sounding survey).
Anglers target brook trout, northern pike on Bullfrog Lake.
Shallow bay flat is the top-rated area: a weed flat in about 5 ft of water that rates prime for northern pike in spring. Scroll up to the map for the complete spot list by 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 Bullfrog 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.
Irrigation Lake 0 mi · Spring Lake 1 mi · Leg of Lamb Lake 1 mi · Slab Lake 1 mi · Hughes Lake 1 mi · La Viollette Lake 1 mi · Deer Lake 1 mi · Pexton Lake 2 mi · Fisher Lake 2 mi · West Twin Lake 2 mi · Point Lake 2 mi · Mud Lake 2 mi
See how Bullfrog Lake stacks up: best northern pike lakes in Ontario · 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.