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40-acre lake in Thunder Bay District, Ontario. The lake tops out around 46 ft. The depth data here comes from the Ontario MNRF survey of 1981 (a transect sounding survey). Here is how the season plays out for each species, straight from the data behind the map.
The drawn water covers 40 acres wrapped in 1.4 miles of bank. A middling shoreline index (1.6) gives it some bays to work without being a maze. 60% of the surface is littoral (under ~15 ft) — cover, weeds and forage water. The basin spans about 0.5 mi end to end and 0.2 mi across at its widest. It sits in Thunder Bay District. If the bite dies, Hob Lake is 0 mi to the southwest.
When the water first warms, brook trout slide up into 2 to 15 ft. By summer they slide out to 10 to 30 ft, and by winter most fish are in 3 to 20 ft. If you only fish one area, make it Break off the point: a drop-off around 11 ft that scores prime in summer. In summer the feeding windows fall in early morning and the evening. Keep a small spoon fished deep or a trolled lake-clear wobbler + worm rigged through the warm months.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 15 ft | dawn & dusk | Main-lake point (2 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 (2 ft) | Small spoon (orange), Spinner |
| Winter | 3 to 20 ft | dawn | Break off the point (11 ft) | Small jigging spoon, Tungsten jig + plastic |
Count 5 structure marks on this chart. The deepest, Deep basin, sits near 45 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 Middleton Lake specifically, so confirm the current rules before you fish.
Check the official Ontario fishing regulations →
Middleton Lake is about 46 ft (14 m) deep at its deepest point. The depth data here comes from the Ontario MNRF survey of 1981 (a transect sounding survey).
Anglers target brook trout on Middleton Lake.
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 Middleton 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.
Hob Lake 0 mi · Tricorn Lake 2 mi · McLeod Lake 3 mi · MacPherson L. 4 mi · Greenwater Lake 5 mi · Sun Lake 7 mi · McKay Lake 7 mi · Making Ground Lake 9 mi · McBean Lake 10 mi · Seagram Lake 10 mi · Little Pic Lake 12 mi · Needle Lake 12 mi
See how Middleton Lake stacks up: best brook trout lakes in Ontario
More water nearby: Thunder Bay District fishing maps (662 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.