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Rating depth structure for brook trout.
Recent public catches load as you reach this section.
205-acre lake in Thunder Bay District, Ontario. The lake tops out around 46 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 1987 (a transect sounding survey). Every species below gets its seasonal read from the same numbers driving the chart.
Penassen Lakes's chart carries 2.8 miles of bank, broken up by an island. With a 2 development index there's bank structure worth casting at, in moderation. The shallow band under 15 ft claims about 77% of the surface — that's where the groceries are. End to end it runs roughly 0.9 mi, about 0.3 mi across. Thunder Bay District claims this one. Its nearest charted neighbour, Magone Lake, is 2 mi to the north.
These fish are listed in an exact-water agency record as forage or ecological context. They are not target-species profiles and do not affect DepthScout's Prime, Good, or Fair spot ratings.
Official Ontario MNRF Fish ON-Line record. The listing documents source-recorded presence, not present abundance or guaranteed catchability.
Spring brook trout on Penassen Lakes hold shallow, usually 2 to 15 ft. They move out to 10 to 30 ft in summer and finish the year down in 3 to 20 ft. Put Break off the point first on the milk run — a drop-off near 11 ft that grades prime for summer. The feeding windows run early morning and the evening. The summer box starts with a small spoon fished deep or a trolled lake-clear wobbler + worm.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 15 ft | dawn & dusk | Main-lake point (10 ft) | Small inline spinner (gold), Tiny spoon |
| Summer | 10 to 30 ft | dawn & dusk | Break off the point (11 ft) | Small spoon fished deep, Trolled lake-clear wobbler + worm |
| Fall | 2 to 15 ft | midday & dawn | Main-lake point (10 ft) | Small spoon (orange), Spinner |
| Winter | 3 to 20 ft | dawn | Break off the point (11 ft) | Small jigging spoon, Tungsten jig + plastic |
Count 6 structure marks on this chart. The deepest, Deep basin, sits near 46 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 Penassen Lakes specifically, so confirm the current rules before you fish.
Check the official Ontario fishing regulations →
Penassen Lakes is about 46 ft (14 m) deep at its deepest point. The depth data here comes from the Ontario MNRF survey of 1987 (a transect sounding survey).
Anglers target brook trout on Penassen Lakes.
Break off the point is the top-rated area: a drop-off in about 11 ft of water that rates prime for brook trout in summer. 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 Penassen Lakes 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.
Magone Lake 2 mi · Walkinshaw Lake 3 mi · Beaverlodge Lake 5 mi · Whitelily Lake 6 mi · Timmus Lake 6 mi · Golding Lake 9 mi · Barnum Lake 10 mi · Boulevard Lake 11 mi · Greenpike Lake 11 mi · Hazelwood Lake 12 mi · Warnica Lake 12 mi · Nalla Lake 13 mi
See how Penassen Lakes stacks up: best brook trout lakes in Ontario
More water nearby: Thunder Bay District fishing maps (662 charts). Browse all Ontario fishing maps. 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.