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140-acre lake in Sudbury District, Ontario. The lake tops out around 40 ft. The contours are modeled from the water's real shoreline and maximum depth. Treat them as a rough guide, and never use them for navigation. What follows comes from the same scoring engine that paints the spots above.
The outline encloses 140 acres, worked by 4.5 miles of shoreline. A development index of 2.7 means a maze of bays and points: far more casting targets than a round bowl of the same size. Littoral water — the productive band under ~15 ft — makes up 75% of this chart, as modeled. Call it 1.4 mi long by 0.4 mi wide at the broadest reach. It sits in Sudbury District. Its nearest charted neighbour, Tom Smith Lake, is 1 mi to the northwest.
Spring brook trout on Gullystone Lake hold shallow, usually 2 to 15 ft. By summer they slide out to 10 to 30 ft, and by winter most fish are in 3 to 20 ft. The chart's best answer is Break off the point — drop-off, 18 ft, prime for summer. Prime time lands in early morning and the evening. The summer box starts with a small spoon fished deep or a trolled lake-clear wobbler + worm.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 15 ft | dawn & dusk | Main-lake point (10 ft) | Small inline spinner (gold), Tiny spoon |
| Summer | 10 to 30 ft | dawn & dusk | Break off the point (18 ft) | Small spoon fished deep, Trolled lake-clear wobbler + worm |
| Fall | 2 to 15 ft | midday & dawn | Main-lake point (10 ft) | Small spoon (orange), Spinner |
| Winter | 3 to 20 ft | dawn | Break off the point (18 ft) | Small jigging spoon, Tungsten jig + plastic |
The spring pattern is a shallow one: lake whitefish in 12 to 40 ft. The depth story barely changes: 12 to 40 ft through summer, 12 to 40 ft in winter. Top water on the chart: Deep basin, a deep basin in the 34 ft range, prime in summer. Time it for early morning. Summer baits: a blade bait vertical or a small jigging spoon gets it done.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 12 to 40 ft | midday & dawn | Break off the point (18 ft) | Small jig + waxworm, Blade bait (small) |
| Summer | 12 to 40 ft | dawn | Deep basin (34 ft) | Blade bait vertical, Small jigging spoon |
| Fall | 8 to 30 ft | dusk | Break off the point (18 ft) | Small spoon (gold), Jig + plastic larva |
| Winter | 12 to 40 ft | midday & dawn | Deep basin (34 ft) | Jigging spoon + bead chain, Tungsten jig + waxie |
In spring, lake sturgeon run shallow here, mostly 3 to 15 ft. Midsummer fish sit out in 15 to 40 ft before dropping to 12 to 40 ft for winter. Fall lake sturgeon concentrate at Deep basin, a prime-rated deep basin around 34 ft. Fish it in after dark and the evening and you'll meet the bite.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 15 ft | dusk & night | open water | |
| Summer | 15 to 40 ft | night & dusk | Deep basin (34 ft) | |
| Fall | 12 to 40 ft | dusk | Deep basin (34 ft) | |
| Winter | 12 to 40 ft | midday | Deep basin (34 ft) |
Count 6 structure marks on this chart. The deepest, Deep basin, sits near 34 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 Gullystone Lake specifically, so confirm the current rules before you fish.
Check the official Ontario fishing regulations →
Gullystone Lake is about 40 ft (12 m) deep at its deepest point. The contours here are modeled from the water's real shape and maximum depth, so treat them as a rough guide.
Anglers target brook trout, lake whitefish, lake sturgeon on Gullystone Lake.
Deep basin is the top-rated area: a deep basin in about 34 ft of water that rates prime for lake whitefish in summer. 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 Gullystone 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.
Tom Smith Lake 1 mi · Westmeath Lake 2 mi · Norfolk Lake 3 mi · Ivanhoe L. 52 3 mi · Ivanhoe L. 53 3 mi · Ivanhoe L. 50 3 mi · Whigham Lake 3 mi · Ivanhoe Lake 4 mi · Gravelridge Lake 4 mi · Ivanhoe L. 41 4 mi · Ivanhoe L. 42 5 mi · Harry Lake 5 mi
See how Gullystone Lake stacks up: best brook trout lakes in Ontario · best lake whitefish lakes in Ontario · best lake sturgeon lakes in Ontario
More water nearby: Sudbury District fishing maps (868 charts). Browse all Ontario fishing maps or see every water on DepthScout. 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.