Sign inSign up free Sign inSign up free Sign inSign up freeLake depth chart
Today's read
Rating depth structure for brook trout.
Recent public catches load as you reach this section.
20-acre lake in Algoma District, Ontario. The lake tops out around 80 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 1971, a decades-old survey (an MNRF lake survey). What follows comes from the same scoring engine that paints the spots above.
The drawn water covers 21 acres wrapped in 0.9 miles of bank. The basin is a simple one (shoreline index 1.4) — close to a bowl, so the structure on the chart matters more than the bank. 66% of the surface is littoral (under ~15 ft) — cover, weeds and forage water. Call it 0.3 mi long by 0.3 mi wide at the broadest reach. Algoma District claims this one. Its nearest charted neighbour, Myrtle Lake, is 1 mi to the north.
Come spring, look for brook trout tight to the bank in 2 to 15 ft. They move out to 10 to 30 ft in summer and finish the year down in 3 to 20 ft. If you only fish one area, make it Shoreline break: a drop-off around 2 ft that scores prime in winter. Best bite is early morning and the evening. A small spoon fished deep or a trolled lake-clear wobbler + worm is the honest summer answer here.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 15 ft | dawn & dusk | Shoreline break (2 ft) | Small inline spinner (gold), Tiny spoon |
| Summer | 10 to 30 ft | dawn & dusk | Shoreline break (2 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 (2 ft) | Small jigging spoon, Tungsten jig + plastic |
Count 4 structure marks on this chart. The deepest, Deep basin, sits near 66 ft.
Access data: Geospatial Ontario - Fishing Access Points; Government of Ontario - MNR Unpatented Crown Land Shoreline; Government of Ontario - MNR Unpatented Crown Land Shoreline. Confirm conditions and fees locally before you launch.
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 Gagnon Lake specifically, so confirm the current rules before you fish.
Check the official Ontario fishing regulations →
Gagnon Lake is about 80 ft (24 m) deep at its deepest point. The depth data here comes from the Ontario MNRF survey of 1971, a decades-old survey (an MNRF lake survey).
Anglers target brook trout on Gagnon Lake.
Shoreline break is the top-rated area: a drop-off in about 2 ft of water that rates prime for brook trout in winter. 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 Gagnon 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.
Myrtle Lake 1 mi · Evelyn Lake 1 mi · Lewis Lake 1 mi · Murphy Lake 2 mi · Claire Lake 2 mi · Cantin Lake 2 mi · Redpine Lake 2 mi · Arnott Lake 2 mi · Anita Lake 2 mi · Audrey Lake 2 mi · Souter Lake 3 mi · Big Skunk Lake 3 mi
See how Gagnon Lake stacks up: best brook trout lakes in Ontario
More water nearby: Algoma District fishing maps (1026 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.