Sign inSign up free Sign inSign up free Sign inSign up freeLake depth chart
Today's read
Recent public catches load as you reach this section.
224-acre lake in Algoma District, Ontario. The lake tops out around 50 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 a transect sounding survey by the Ontario MNRF. Below is the species-by-species picture, pulled from the same data the map uses.
Traced from the shoreline, Grey Trout Lake runs 225 acres with 3.9 miles of edge, broken up by an island. Index 1.9 on the shoreline: a few honest points and pockets, nothing labyrinthine. Roughly 19% of the water is 15 ft or less, the band where the food chain lives. Tip to tip the water measures near 1.6 mi with a 0.4-mi widest point. You'll find it in Algoma District. The nearest mapped water is Rottier L., 1 mi to the north.
These fish are listed in an exact-water agency record as forage or ecological context. They are not target-species profiles and do not affect DepthScout's Prime, Good, or Fair spot ratings.
Official Ontario MNRF Fish ON-Line record. The listing documents source-recorded presence, not present abundance or guaranteed catchability.
The spring pattern is a shallow one: lake trout in 10 to 40 ft. Midsummer fish sit out in 15 to 50 ft before dropping to 13 to 50 ft for winter. The spot to know is Deep basin, a deep basin in about 50 ft of water that rates prime for lake trout in summer. Plan around early morning in the warm months. Summer baits: a white tube jig (deep) or a magnum spoon on downrigger gets it done.
Depth note: when a documented seasonal range extends below this chart, the table shows the deepest mapped working water, not a verified holding depth.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 10 to 40 ft | dawn & dusk | Break off the point (41 ft) | Casting spoon over shoals, Jerkbait (shallow) |
| Summer | 15 to 50 ft chart-limited; documented 50 to 120 ft | dawn | Deep basin (50 ft) | White tube jig (deep), Magnum spoon on downrigger |
| Fall | 10 to 50 ft | dusk & dawn | Break off the point (41 ft) | Heavy casting spoon, Jigging rap over reefs |
| Winter | 13 to 50 ft chart-limited; documented 20 to 80 ft | dawn | Deep basin (50 ft) | White tube jig, Airplane jig |
Come spring, look for lake whitefish tight to the bank in 15 to 45 ft. They move out to 15 to 50 ft in summer and finish the year down in 15 to 50 ft. If you only fish one area, make it Deep basin: a deep basin around 50 ft that scores prime in summer. Best bite is early morning. A blade bait vertical or a small jigging spoon is the honest summer answer here.
Depth note: when a documented seasonal range extends below this chart, the table shows the deepest mapped working water, not a verified holding depth.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 15 to 45 ft | midday & dawn | Break off the point (41 ft) | Small jig + waxworm, Blade bait (small) |
| Summer | 15 to 50 ft chart-limited; documented 40 to 90 ft | dawn | Deep basin (50 ft) | Blade bait vertical, Small jigging spoon |
| Fall | 8 to 30 ft | dusk | open water | Small spoon (gold), Jig + plastic larva |
| Winter | 15 to 50 ft chart-limited; documented 25 to 70 ft | midday & dawn | Deep basin (50 ft) | Jigging spoon + bead chain, Tungsten jig + waxie |
In spring, smallmouth bass run shallow here, mostly 3 to 12 ft. Midsummer fish sit out in 10 to 30 ft before dropping to 20 to 45 ft for winter. Winter smallmouth bass concentrate at Break off the point, a prime-rated drop-off around 41 ft. Fish it in early morning and the evening and you'll meet the bite. You won't need more than a drop shot (goby/minnow) or a ned rig most summer days.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 12 ft | dawn & dusk | Main-lake point (1 ft) | Ned rig, Tube jig |
| Summer | 10 to 30 ft | dawn & dusk | Main-lake point (1 ft) | Drop shot (goby/minnow), Ned rig |
| Fall | 8 to 25 ft | midday & dawn | Main-lake point (1 ft) | Jerkbait, Blade bait |
| Winter | 20 to 45 ft | midday | Break off the point (41 ft) | Blade bait, Hair jig |
The spring pattern is a shallow one: burbot in 15 to 50 ft. The depth story barely changes: 15 to 50 ft through summer, 13 to 50 ft in winter. The spot to know is Deep basin, a deep basin in about 50 ft of water that rates prime for burbot in spring. Plan around after dark and midday in the warm months. Summer baits: a heavy jig + cut bait gets it done.
Depth note: when a documented seasonal range extends below this chart, the table shows the deepest mapped working water, not a verified holding depth.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 15 to 50 ft chart-limited; documented 25 to 70 ft | night & dusk | Deep basin (50 ft) | Glow jigging spoon + cut bait, Rattle bait (dark) |
| Summer | 15 to 50 ft chart-limited; documented 50 to 120 ft | night & midday | Deep basin (50 ft) | Heavy jig + cut bait |
| Fall | 15 to 50 ft chart-limited; documented 30 to 80 ft | night & dusk | Deep basin (50 ft) | Glow spoon + minnow head, Blade bait (slow) |
| Winter | 13 to 50 ft chart-limited; documented 15 to 60 ft | night & dusk | Deep basin (50 ft) | Glow tungsten + cut bait, Rattle spoon + minnow head |
6 pieces of structure are mapped here — Deep basin, around 50 ft, is the deepest of them.
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 Grey Trout Lake specifically, so confirm the current rules before you fish.
Check the official Ontario fishing regulations →
Grey Trout Lake is about 50 ft (15 m) deep at its deepest point. The depth data here comes from a transect sounding survey by the Ontario MNRF.
Anglers target lake trout, lake whitefish, smallmouth bass, burbot on Grey Trout Lake.
Deep basin is the top-rated area: a deep basin in about 50 ft of water that rates prime for lake trout in summer. Every other rated spot, per species and season, is on the map above.
For lake trout, the summer bite is best in early morning. Each species page section below lists the seasonal windows, and the map shows a live NOW badge when you're inside one.
Fishing on Grey Trout 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.
Rottier L. 1 mi · Moon Lake 2 mi · Mount Lake 2 mi · Burnt Lake 3 mi · Bevans Lake 3 mi · Stewleen Lake 3 mi · Winchester Lake 3 mi · Survey Lake 3 mi · Tenfish Lake 4 mi · Vasseau Lake 4 mi · Tee Lake 4 mi · Rawhide Lake 4 mi
See how Grey Trout Lake stacks up: best smallmouth bass lakes in Ontario · best lake trout lakes in Ontario · best lake whitefish lakes in Ontario · best burbot 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.