Sign inSign up free Sign inSign up free Sign inSign up freeShared by DepthScout anglers. Exact spots stay private, always.
21-acre lake in Cochrane District, Ontario. The lake tops out around 33 ft. The depth data here comes from the Ontario MNRF survey of 1985 (a transect sounding survey). The season-by-season read for each species follows, from the map's own numbers.
The outline encloses 21 acres, worked by 0.8 miles of shoreline. Nearly circular (index 1.2), so the story is the bottom, not the bank. Roughly 75% of the water is 15 ft or less, the band where the food chain lives. Call it 0.3 mi long by 0.2 mi wide at the broadest reach. It sits in Cochrane District. Guenette Lake sits 1 mi southwest — the closest neighbouring chart.
Early season northern pike use the shallows, holding in 2 to 8 ft. Summer is an 8 to 20 ft game here, winter a 5 to 15 ft one. The chart's best answer is Break off the point — drop-off, 16 ft, prime for fall. Best bite is early morning and the evening. Tie on a bucktail or a weedless spoon over cabbage and you're in the game.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 8 ft | midday & dawn | open water | #5 inline spinner, Spoon (red/white) |
| Summer | 8 to 20 ft | dawn & dusk | Break off the point (16 ft) | Bucktail, Weedless spoon over cabbage |
| Fall | 6 to 18 ft | midday & dawn | Break off the point (16 ft) | Big rubber (Bull Dawg style), Husky-style jerkbait |
| Winter | 5 to 15 ft | midday | Main-lake point (7 ft) | Tip-ups, Large jigging spoon |
O'Brien Lake 7 carries 3 mapped structure features, topping out (or rather bottoming out) at Deep basin, about 30 ft down.
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 O'Brien Lake 7 specifically, so confirm the current rules before you fish.
Check the official Ontario fishing regulations →
O'Brien Lake 7 is about 33 ft (10 m) deep at its deepest point. The depth data here comes from the Ontario MNRF survey of 1985 (a transect sounding survey).
Anglers target northern pike on O'Brien Lake 7.
Break off the point is the top-rated area: a drop-off in about 16 ft of water that rates prime for northern pike in fall. Scroll up to the map for the complete spot list by species and season.
For northern pike, 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 O'Brien Lake 7 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.
Guenette Lake 1 mi · Proulx Lake 2 mi · Lily Lake 2 mi · Teetzel Lake 4 5 mi · Teetzel L. 5 5 mi · Clear Lake 5 mi · Gurney Lake 13 6 mi · Duck Lake 6 mi · Teetzel L. 9 6 mi · Swanson Lake 8 mi · Remi Lake 9 mi · Potvin Lake 9 mi
See how O'Brien Lake 7 stacks up: best northern pike lakes in Ontario
More water nearby: Cochrane District fishing maps (673 charts). Browse all Ontario fishing maps or see every water on DepthScout. Bathymetry credit: state fisheries survey programs. 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.