Sign inSign up free Sign inSign up free Sign inSign up freeLake depth chart
Today's read
Shared by DepthScout anglers. Exact spots stay private, always.
12-acre lake in Cochrane District, Ontario. The lake tops out around 7 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 2003 (an MNRF lake survey). The season-by-season read for each species follows, from the map's own numbers.
The outline encloses 12 acres, worked by 0.8 miles of shoreline. With a 1.5 development index there's bank structure worth casting at, in moderation. Every acre of it sits shallower than ~15 ft: one big littoral zone, cover and forage throughout. Figure 0.3 mi of water from one end to the other. Cochrane District claims this one. If the bite dies, Fade Lake is 2 mi to the west.
Early season brook trout use the shallows, holding in 1 to 7 ft. Even in summer they hold at 2 to 7 ft; winter keeps them in 1 to 7 ft. The chart's best answer is Deep basin — deep basin, 3 ft, prime for summer. Best bite is 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 | 1 to 7 ft | dawn & dusk | Main-lake point (2 ft) | Small inline spinner (gold), Tiny spoon |
| Summer | 2 to 7 ft | dawn & dusk | Deep basin (3 ft) | Small spoon fished deep, Trolled lake-clear wobbler + worm |
| Fall | 1 to 7 ft | midday & dawn | Main-lake point (2 ft) | Small spoon (orange), Spinner |
| Winter | 1 to 7 ft | dawn | Deep basin (3 ft) | Small jigging spoon, Tungsten jig + plastic |
The chart marks 4 structure features on Monahan Lake; the deepest is Deep basin at about 3 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 Monahan Lake specifically, so confirm the current rules before you fish.
Check the official Ontario fishing regulations →
Monahan Lake is about 7 ft (2 m) deep at its deepest point. The depth data here comes from the Ontario MNRF survey of 2003 (an MNRF lake survey).
Anglers target brook trout on Monahan Lake.
Deep basin is the top-rated area: a deep basin in about 3 ft of water that rates prime for brook trout in summer. Every other rated spot, per species and season, is on the map above.
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 Monahan 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.
Fade Lake 2 mi · Perry Lake 2 mi · Munro Lake 3 mi · Keller Lake 3 mi · McLean Lake 3 mi · Blueberry Lake 3 mi · McCulloch Lake 3 mi · Knight Lake 4 mi · Hewitt Lake 5 mi · Pike Lake 5 mi · Milligan Lake 5 mi · Emens Lake 5 mi
See how Monahan Lake 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.