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.
7,209-acre lake in Thunder Bay District, Ontario. The lake tops out around 26 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 1978, a decades-old survey (a transect sounding survey). Every species below gets its seasonal read from the same numbers driving the chart.
On the chart, Greenbush Lake draws 7,242 acres inside 105.6 miles of shoreline, broken up by 188 islands. An index of 8.9 puts the bank firmly in maze territory: point after pocket after cove, every one a casting target. About 95% of the surface sits shallower than 15 ft — that's the weed-and-bait zone. Tip to tip the water measures near 9.1 mi with a 3.9-mi widest point. The water lies in Thunder Bay District. Closest neighbour on DepthScout: East Pashkokogan Lake, 7 mi west of here.
When the water first warms, lake whitefish slide up into 8 to 26 ft. There's no big seasonal slide here — summer means 8 to 26 ft, winter 8 to 26 ft. If you only fish one area, make it Deep basin: a deep basin around 22 ft that scores prime in summer. In summer the feeding windows fall in early morning. Keep a blade bait vertical or a small jigging spoon rigged through the warm months.
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 | 8 to 26 ft chart-limited; documented 15 to 45 ft | midday & dawn | Gravel shoal (5 ft) | Small jig + waxworm, Blade bait (small) |
| Summer | 8 to 26 ft chart-limited; documented 40 to 90 ft | dawn | Deep basin (22 ft) | Blade bait vertical, Small jigging spoon |
| Fall | 7 to 26 ft chart-limited; documented 8 to 30 ft | dusk | Gravel shoal (5 ft) | Small spoon (gold), Jig + plastic larva |
| Winter | 8 to 26 ft chart-limited; documented 25 to 70 ft | midday & dawn | Deep basin (22 ft) | Jigging spoon + bead chain, Tungsten jig + waxie |
When the water first warms, cisco (lake herring) slide up into 7 to 26 ft. There's no big seasonal slide here — summer means 8 to 26 ft, winter 8 to 26 ft. If you only fish one area, make it Deep basin: a deep basin around 22 ft that scores prime in spring. In summer the feeding windows fall in early morning. Keep a vertical flutter spoon (small) or a drop-shot micro plastic rigged through the warm months.
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 | 7 to 26 ft chart-limited; documented 10 to 40 ft | dawn & dusk | Deep basin (22 ft) | Small silver spoon, Tiny swim jig (white) |
| Summer | 8 to 26 ft chart-limited; documented 40 to 80 ft | dawn | Deep basin (22 ft) | Vertical flutter spoon (small), Drop-shot micro plastic |
| Fall | 5 to 25 ft | dusk & dawn | Gravel shoal (5 ft) | Small casting spoon, Inline spinner (silver) |
| Winter | 8 to 26 ft chart-limited; documented 20 to 60 ft | dawn | Deep basin (22 ft) | Small jigging spoon (glow/silver), Tungsten jig + minnow head |
Early season walleye use the shallows, holding in 4 to 15 ft. Summer is an 8 to 26 ft game here, winter an 8 to 26 ft one. The chart's best answer is Gravel shoal — gravel shoal, 5 ft, prime for spring. Best bite is the evening and early morning. Tie on a crawler harness on bottom bouncer or a deep crankbait (trolled) and you're in the game.
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 | 4 to 15 ft | dusk & dawn | Gravel shoal (5 ft) | 1/8 oz jig + minnow, Hair jig |
| Summer | 8 to 26 ft chart-limited; documented 15 to 35 ft | dusk & dawn | Deep basin (22 ft) | Crawler harness on bottom bouncer, Deep crankbait (trolled) |
| Fall | 8 to 26 ft chart-limited; documented 12 to 40 ft | dusk & night | Deep basin (22 ft) | Jigging rap, Jig + big minnow |
| Winter | 8 to 26 ft chart-limited; documented 20 to 40 ft | dusk & dawn | Deep basin (22 ft) | Jigging spoon + minnow head, Rattle bait |
Spring yellow perch on Greenbush Lake hold shallow, usually 3 to 12 ft. By summer they slide out to 8 to 26 ft, and by winter most fish are in 8 to 26 ft. The chart's best answer is Weed flat — weed flat, 3 ft, prime for spring. Prime time lands in early morning. The summer box starts with a drop-shot micro plastics or a small spoon tipped with worm.
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 | 3 to 12 ft | midday & dawn | Weed flat (3 ft) | Small jig + curly tail, Perch-pattern micro crank |
| Summer | 8 to 26 ft chart-limited; documented 10 to 30 ft | dawn | Deep basin (22 ft) | Drop-shot micro plastics, Small spoon tipped with worm |
| Fall | 8 to 26 ft chart-limited; documented 12 to 35 ft | midday | Deep basin (22 ft) | Jigging spoon (small), Perch rig / spreader |
| Winter | 8 to 26 ft chart-limited; documented 15 to 35 ft | midday & dawn | Deep basin (22 ft) | Tungsten jig + spikes, Rattle spoon (small) |
Spring puts northern pike in skinny water — 2 to 8 ft is the zone. As the season builds they drop to 8 to 20 ft, wintering in 5 to 15 ft. Spring northern pike concentrate at Weed flat, a prime-rated weed flat around 3 ft. Warm-month bites cluster around early morning and the evening. A bucktail or a weedless spoon over cabbage covers the summer program.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 8 ft | midday & dawn | Weed flat (3 ft) | #5 inline spinner, Spoon (red/white) |
| Summer | 8 to 20 ft | dawn & dusk | Shallow feeding flat (14 ft) | Bucktail, Weedless spoon over cabbage |
| Fall | 6 to 18 ft | midday & dawn | Shallow feeding flat (14 ft) | Big rubber (Bull Dawg style), Husky-style jerkbait |
| Winter | 5 to 15 ft | midday | Weed flat (4 ft) | Tip-ups, Large jigging spoon |
When the water first warms, rock bass slide up into 2 to 10 ft. By summer they slide out to 5 to 20 ft, and by winter most fish are in 8 to 26 ft. If you only fish one area, make it Gravel shoal: a gravel shoal around 5 ft that scores prime in spring. In summer the feeding windows fall in the evening. Keep a ned rig (small) or a marabou jig rigged through the warm months.
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 | 2 to 10 ft | midday & dawn | Gravel shoal (5 ft) | 1/16 oz jig + grub, Small inline spinner |
| Summer | 5 to 20 ft | dusk | Shoreline point (3 ft) | Ned rig (small), Marabou jig |
| Fall | 8 to 22 ft | midday | Break off the point (3 ft) | Small tube jig, Inline spinner |
| Winter | 8 to 26 ft chart-limited; documented 12 to 30 ft | midday | Deep basin (22 ft) | Tungsten jig + plastic, Small spoon + spike |
12 pieces of structure are mapped here — Deep basin, around 22 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 Greenbush Lake specifically, so confirm the current rules before you fish.
Check the official Ontario fishing regulations →
Greenbush Lake is about 26 ft (8 m) deep at its deepest point. The depth data here comes from the Ontario MNRF survey of 1978, a decades-old survey (a transect sounding survey).
Anglers target lake whitefish, cisco (lake herring), walleye, yellow perch, northern pike, rock bass on Greenbush Lake.
Deep basin is the top-rated area: a deep basin in about 22 ft of water that rates prime for lake whitefish in summer. Every other rated spot, per species and season, is on the map above.
For lake whitefish, 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 Greenbush 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.
East Pashkokogan Lake 7 mi · Velos Lake 9 mi · Pashkokogan Lake 10 mi · McCrea Lake 12 mi · Koval Lake 19 mi · Little Savant Lake 21 mi · Jabez Lake 21 mi · Medcalf Lake 22 mi · Bowcott Lake 23 mi · Ranger Lake 23 mi · Hillside Lake 24 mi · Minchin Lake 25 mi
See how Greenbush Lake stacks up: best walleye lakes in Ontario · best northern pike lakes in Ontario · best yellow perch lakes in Ontario · best lake whitefish lakes in Ontario
More water nearby: Thunder Bay District fishing maps (662 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.