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8-acre lake in Cochrane District, Ontario. The lake tops out around 78 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. Here's the year, species by species, as the scoring engine sees it.
Drawn out, this is 8 acres of water rimmed by 0.4 miles of bank. A shoreline index of 1.1 says round and simple: fish relate to depth changes here, not shoreline features. 59% of the surface is littoral (under ~15 ft) — cover, weeds and forage water. The water lies in Cochrane District. For a second option, Anne L. lies 0 mi northwest.
Spring puts brook trout in skinny water — 2 to 15 ft is the zone. Warm water sends them out to 10 to 30 ft; cold water stacks them in 3 to 20 ft. Shoreline break is the standout, a drop-off at roughly 1 ft, rated good for winter brook trout. Plan around early morning and the evening in the warm months. A small spoon fished deep or a trolled lake-clear wobbler + worm covers the summer program.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 15 ft | dawn & dusk | Shoreline break (1 ft) | Small inline spinner (gold), Tiny spoon |
| Summer | 10 to 30 ft | dawn & dusk | Shoreline break (1 ft) | 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 | Shoreline break (1 ft) | Small jigging spoon, Tungsten jig + plastic |
Count 3 structure marks on this chart. The deepest, Deep basin, sits near 59 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 Marilyn L. specifically, so confirm the current rules before you fish.
Check the official Ontario fishing regulations →
Marilyn L. is about 78 ft (24 m) deep at its deepest point. 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.
Anglers target brook trout on Marilyn L..
Shoreline break is the top-rated area: a drop-off in about 1 ft of water that rates good for brook trout in winter. 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 Marilyn L. 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.
Anne L. 0 mi · Cooke L. 1 mi · Mirky L. 1 mi · Mary L. 1 mi · Marathon Lake 2 mi · Trusz L. 2 mi · Watton L. 3 mi · Upper Bingle Lake 3 mi · Lake 12L-17 3 mi · Bingle Lake 3 mi · Dungg L. 3 mi · Lake 12L-12 3 mi
See how Marilyn L. stacks up: best brook trout lakes in Ontario
More water nearby: Cochrane District fishing maps (673 charts). Browse all Ontario fishing maps or 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.