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Rating depth structure for brook trout.
Recent public catches load as you reach this section.
54-acre lake in Thunder Bay District, Ontario. The lake tops out around 121 ft. Depth here is modeled from the true shoreline and max depth rather than surveyed; use it to plan, not to navigate. Here's the year, species by species, as the scoring engine sees it.
The drawn water covers 55 acres wrapped in 1.3 miles of bank. At index 1.3 the outline is almost a bowl — read the depth changes, not the shoreline. Littoral water — the productive band under ~15 ft — makes up 15% of this chart, as modeled. End to end it runs roughly 0.4 mi, about 0.4 mi across. It sits in Thunder Bay District. McLeod Lake sits 2 mi east — the closest neighbouring chart.
Early season brook trout use the shallows, holding in 2 to 15 ft. Expect a summer slide to 10 to 30 ft, then a winter hold in 3 to 20 ft. Put Shallow bay flat first on the milk run — a feeding flat near 6 ft that grades good for spring. In summer the feeding windows fall in early morning and the evening. Tie on a small spoon fished deep or a trolled lake-clear wobbler + worm and you're in the game.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 15 ft | dawn & dusk | Shallow bay flat (6 ft) | Small inline spinner (gold), Tiny spoon |
| Summer | 10 to 30 ft | dawn & dusk | open water | Small spoon fished deep, Trolled lake-clear wobbler + worm |
| Fall | 2 to 15 ft | midday & dawn | open water | Small spoon (orange), Spinner |
| Winter | 3 to 20 ft | dawn | Shallow bay flat (6 ft) | Small jigging spoon, Tungsten jig + plastic |
Structure-wise the chart holds 5 features, led in depth by Deep basin at roughly 103 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 Greenwater Lake specifically, so confirm the current rules before you fish.
Check the official Ontario fishing regulations →
Greenwater Lake is about 121 ft (37 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 Greenwater Lake.
Shallow bay flat is the top-rated area: a feeding flat in about 6 ft of water that rates good for brook trout in spring. 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 Greenwater 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.
McLeod Lake 2 mi · Tricorn Lake 3 mi · Making Ground Lake 4 mi · Hob Lake 5 mi · Middleton Lake 5 mi · Needle Lake 7 mi · Sun Lake 7 mi · MacPherson L. 8 mi · McBean Lake 8 mi · McKay Lake 9 mi · Long Lake 11 mi · Seagram Lake 11 mi
See how Greenwater 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.