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Rating depth structure for brook trout.
Recent public catches load as you reach this section.
6-acre lake in Thunder Bay District, Ontario. The lake tops out around 32 ft. These contours are modeled — built from the real shoreline and the water's maximum depth — so read them as a guide, never as navigation. Every species below gets its seasonal read from the same numbers driving the chart.
On the chart, Bat Lake draws 5 acres inside 0.7 miles of shoreline. Index 2.1 on the shoreline: a few honest points and pockets, nothing labyrinthine. The shallow band under 15 ft claims about 98% of the surface on the model — that's where the groceries are. Tip to tip the water measures near 0.3 mi. The water lies in Thunder Bay District. Closest neighbour on DepthScout: Fall Lake, 1 mi west of here.
The spring pattern is a shallow one: brook trout in 2 to 15 ft. Midsummer fish sit out in 10 to 30 ft before dropping to 3 to 20 ft for winter. The spot to know is Deep basin, a deep basin in about 27 ft of water that rates prime for brook trout in summer. Plan around early morning and the evening in the warm months. Summer baits: a small spoon fished deep or a trolled lake-clear wobbler + worm gets it done.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 15 ft | dawn & dusk | Main-lake point (8 ft) | Small inline spinner (gold), Tiny spoon |
| Summer | 10 to 30 ft | dawn & dusk | Deep basin (27 ft) | Small spoon fished deep, Trolled lake-clear wobbler + worm |
| Fall | 2 to 15 ft | midday & dawn | Main-lake point (8 ft) | Small spoon (orange), Spinner |
| Winter | 3 to 20 ft | dawn | Break off the point (14 ft) | Small jigging spoon, Tungsten jig + plastic |
Count 4 structure marks on this chart. The deepest, Deep basin, sits near 27 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 Bat Lake specifically, so confirm the current rules before you fish.
Check the official Ontario fishing regulations →
Bat Lake is about 32 ft (10 m) deep at its deepest point. The contours here are modeled from the water's real shape and maximum depth, so treat them as a rough guide.
Anglers target brook trout on Bat Lake.
Deep basin is the top-rated area: a deep basin in about 27 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 Bat 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.
Fall Lake 1 mi · Miner Lake 1 mi · Billy Lake 2 mi · Welburn Lake 3 mi · Bishops Lake 3 mi · Cavern Lake 3 mi · Innes Lake 5 mi · Wiggins Lake 5 mi · MacIntosh Lake 5 mi · Nolan Lake 5 mi · Himdick Lake 6 mi · Hilma Lake 6 mi
See how Bat Lake 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. 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.