Grant Lake Depth Map & Fishing Spots (Algoma District, ON)

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Lake depth chart

Grant Lake, ON

Max 35 ft

Today's read

Where to start

Hopper & ant season (windward banks) window is on — see the hatch outlook

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 generated from real agency depth surveys; use the survey badge for the provider, dataset, datum and measured coverage. Never use for navigation. Always check local regulations.

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Recent catches at Grant 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 Grant Lake on the board.

Fishing Grant Lake: what the data says

16-acre lake in Algoma District, Ontario. The lake tops out around 35 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 2025 (an MNRF lake survey). What the data behind the map says about each species, season by season:

Drawn out, this is 15 acres of water rimmed by 1 miles of bank. Index 1.8 on the shoreline: a few honest points and pockets, nothing labyrinthine. 80% of the surface is littoral (under ~15 ft) — cover, weeds and forage water. End to end it runs roughly 0.3 mi, about 0.2 mi across. The water lies in Algoma District. Closest neighbour on DepthScout: Hoath Lake, 0 mi northeast of here.

Brook Trout fishing at Grant Lake

The spring pattern is a shallow one: brook trout in 2 to 15 ft. Midsummer fish sit out in 10 to 30 ft before dropping to 3 to 20 ft for winter. The spot to know is Break off the point, a drop-off in about 17 ft of water that rates prime for brook trout in summer. Plan around early morning and the evening in the warm months. Summer baits: a small spoon fished deep or a trolled lake-clear wobbler + worm gets it done.

Season	Depth	Best window	Start at	Go-to baits
Spring	2 to 15 ft	dawn & dusk	Main-lake point (7 ft)	Small inline spinner (gold), Tiny spoon
Summer	10 to 30 ft	dawn & dusk	Break off the point (17 ft)	Small spoon fished deep, Trolled lake-clear wobbler + worm
Fall	2 to 15 ft	midday & dawn	Main-lake point (7 ft)	Small spoon (orange), Spinner
Winter	3 to 20 ft	dawn	Break off the point (17 ft)	Small jigging spoon, Tungsten jig + plastic

Notable structure

Structure-wise the chart holds 4 features, led in depth by Deep basin at roughly 35 ft.

Deep basin: deep basin, around 35 ft
Break off the point: drop-off, around 17 ft
Main-lake point: point, around 7 ft
Shallow bay flat: weed flat, around 2 ft

Public access & boat ramps

Grant Lake Shoreline Access — shore access

Access data: Geospatial Ontario - Fishing Access Points. Confirm conditions and fees locally before you launch.

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

Check the official Ontario fishing regulations →

Common questions

How deep is Grant Lake?

Grant Lake is about 35 ft (11 m) deep at its deepest point. The depth data here comes from the Ontario MNRF survey of 2025 (an MNRF lake survey).

What fish are in Grant Lake?

Anglers target brook trout on Grant Lake.

Where is the best fishing spot on Grant Lake?

Break off the point is the top-rated area: a drop-off in about 17 ft of water that rates prime for brook trout in summer. The map above holds the full rated-spot list for every species and season.

When is the best time to fish Grant 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 Grant Lake?

Fishing on Grant 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

Hoath Lake 0 mi · Patten Lake 2 mi · Hugli Lake 2 mi · Chipman Lake 2 mi · Tarpaper Lake 2 mi · Rheaume Lake 2 mi · Thorp Lake 3 mi · McMahon Lake 3 mi · Snare Lake 4 mi · Petauguin Lake 4 mi · Havilah Lake 4 mi · Bass Lake 4 mi

See how Grant Lake stacks up: best brook trout lakes in Ontario

More water nearby: Algoma District fishing maps (1026 charts). Browse all Ontario fishing maps or 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.