Tom Smith Lake Depth Map & Fishing Spots (ON)

Hatch outlook

Hopper & ant season (windward banks)Active window

Typical here: Jul 1 – Sep 15 · hoppers peak July–August; winged-ant falls show up on warm humid afternoons — a wind event, not a hatch

adultwarm, breezy afternoons, roughly 1–5pm — slap the imitation down hard — the splat is the trigger — then wait; count to three after the rise before setting

Work the windward bank on breezy summer afternoons — that's where the food is. Casting-bubble-and-hopper is the direct translation; otherwise run small topwaters and inline spinners tight along the grass edges and blowdown banks in the afternoon warmth.

The event happens over windward grassy banks, overhanging brush and blowdowns — wherever the breeze dumps the bugs

Next on this water

Spring bug season (brook trout lakes) · forageApr 25 – Jun 30 · in ~8 months

Hex (giant mayfly) · mayflyMay 25 – Aug 10 · in ~9 months

Recommendations come from depth structure and seasonal species behavior. Treat them as a starting point, not a guarantee. Contours here are interpolated from real agency depth surveys (state DNR / USACE). Never use for navigation. Always check local regulations.

Loading depth chart…

Recent catches at Tom Smith Lake

Shared by DepthScout anglers. Exact spots stay private, always.

No shared catches here yet — be the first.Log a catch from the map above and share it to put Tom Smith Lake on the board.

Fishing Tom Smith Lake: what the data says

368-acre lake in Sudbury District, Ontario. The lake tops out around 25 ft. The depth data here comes from the Ontario MNRF survey of 1961, a decades-old survey (a transect sounding survey). Here is how the season plays out for each species, straight from the data behind the map.

Brook Trout fishing at Tom Smith Lake

Early season brook trout use the shallows, holding in 2 to 15 ft. Summer is an 8 to 25 ft game here, winter a 3 to 20 ft one. The chart's best answer is Deep basin — deep basin, 25 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	2 to 15 ft	dawn & dusk	Main-lake point (1 ft)	Small inline spinner (gold), Tiny spoon
Summer	8 to 25 ft	dawn & dusk	Deep basin (25 ft)	Small spoon fished deep, Trolled lake-clear wobbler + worm
Fall	2 to 15 ft	midday & dawn	Main-lake point (1 ft)	Small spoon (orange), Spinner
Winter	3 to 20 ft	dawn	Break off the point (9 ft)	Small jigging spoon, Tungsten jig + plastic

Lake Whitefish fishing at Tom Smith Lake

Start shallow in spring: lake whitefish sit in 8 to 25 ft that time of year. They don't go far with the seasons — 8 to 25 ft covers summer, 8 to 25 ft covers winter. Top water on the chart: Deep basin, a deep basin in the 25 ft range, prime in summer. Fish it in early morning and you'll meet the bite. Throw a blade bait vertical or a small jigging spoon until the fish tell you otherwise.

Season	Depth	Best window	Start at	Go-to baits
Spring	8 to 25 ft	midday & dawn	Break off the point (9 ft)	Small jig + waxworm, Blade bait (small)
Summer	8 to 25 ft	dawn	Deep basin (25 ft)	Blade bait vertical, Small jigging spoon
Fall	7 to 25 ft	dusk	Break off the point (9 ft)	Small spoon (gold), Jig + plastic larva
Winter	8 to 25 ft	midday & dawn	Deep basin (25 ft)	Jigging spoon + bead chain, Tungsten jig + waxie

Notable structure

Count 6 structure marks on this chart. The deepest, Deep basin, sits near 25 ft.

Deep basin: deep basin, around 25 ft
Break off the point: drop-off, around 9 ft
Main-lake point: point, around 1 ft
Secondary point: point, around 1 ft
Shallow bay flat: weed flat, around 1 ft
Back-bay flat: weed flat, around 1 ft

Tom Smith Lake fishing regulations

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 Tom Smith Lake specifically, so confirm the current rules before you fish.

Check the official Ontario fishing regulations →

Common questions

How deep is Tom Smith Lake?

Tom Smith Lake is about 25 ft (8 m) deep at its deepest point. The depth data here comes from the Ontario MNRF survey of 1961, a decades-old survey (a transect sounding survey).

What fish are in Tom Smith Lake?

Anglers target brook trout, lake whitefish on Tom Smith Lake.

Where is the best fishing spot on Tom Smith Lake?

Deep basin is the top-rated area: a deep basin in about 25 ft of water that rates prime for lake whitefish in summer. The interactive chart above rates every spot for each species and season.

When is the best time to fish Tom Smith Lake?

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.

What are the fishing regulations for Tom Smith Lake?

Fishing on Tom Smith 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.

Nearby waters

Gullystone Lake 1 mi · Ivanhoe L. 52 3 mi · Ivanhoe Lake 3 mi · Ivanhoe L. 53 3 mi · Ivanhoe L. 50 3 mi · Norfolk Lake 3 mi · Westmeath Lake 3 mi · Ivanhoe L. 41 4 mi · Ivanhoe L. 42 4 mi · Whigham Lake 5 mi · Gravelridge Lake 6 mi · Ivanhoe L. 1 6 mi

See how Tom Smith Lake stacks up: best brook trout lakes in Ontario · best lake whitefish lakes in Ontario

More water nearby: Sudbury District fishing maps (868 charts). Browse all Ontario fishing maps or see every water on DepthScout. Bathymetry credit: state fisheries survey programs. 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.