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Rating depth structure for brook trout.
Recent public catches load as you reach this section.
128-acre lake in Thunder Bay District, Ontario. The lake tops out around 57 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 1989 (an MNRF lake survey). The season-by-season read for each species follows, from the map's own numbers.
The drawn water covers 129 acres wrapped in 4.8 miles of bank. An index of 3 puts the bank firmly in maze territory: point after pocket after cove, every one a casting target. The shallow band under 15 ft claims about 77% of the surface — that's where the groceries are. Figure 1.3 mi of water from one end to the other, 0.4 mi at the beam. It sits in Thunder Bay District. Its nearest charted neighbour, Flicker Lake, is 3 mi to the northwest.
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 13 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 (1 ft) | Small inline spinner (gold), Tiny spoon |
| Summer | 10 to 30 ft | dawn & dusk | Break off the point (13 ft) | Small spoon fished deep, Trolled lake-clear wobbler + worm |
| Fall | 2 to 15 ft | midday & dawn | Main-lake point (1 ft) | Small spoon (orange), Spinner |
| Winter | 3 to 20 ft | dawn | Break off the point (13 ft) | Small jigging spoon, Tungsten jig + plastic |
The chart marks 6 structure features on Chapman Lake; the deepest is Deep basin at about 51 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 Chapman Lake specifically, so confirm the current rules before you fish.
Check the official Ontario fishing regulations →
Chapman Lake is about 57 ft (17 m) deep at its deepest point. The depth data here comes from the Ontario MNRF survey of 1989 (an MNRF lake survey).
Anglers target brook trout on Chapman Lake.
Break off the point is the top-rated area: a drop-off in about 13 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 Chapman 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.
Flicker Lake 3 mi · Big Duck Lake 6 mi · Dickison Lake 8 mi · Crosman Lake 9 mi · Bluff Lake 9 mi · Deep Lake 10 mi · Baldwin Lake 11 mi · Ambrose Lake 12 mi · Flag Lake 12 mi · Fitzpatrick Lake 12 mi · Teesquare Lake 14 mi · Felix Lake 14 mi
See how Chapman 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. 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.