Johns L. Depth Map & Fishing Spots (ON)

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Lake depth chart

Johns L., ON

Max 10 ft

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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

Fall shiner runActive window

Typical here: Sep 1 – Oct 31 · same push on the Ontario side — Simcoe's shiners migrate shallow as the water cools, and the predators ride with them

adultdaylight for the jig bite; after dark the shiners stack under dock lights with walleyes and pike mixed right in — follow the bait, not the spot — millions of shiners move together and the predators ride with them; silver profile and flash matter

Concentrates hard but travels — the school (and the walleyes under it) can be off a river mouth one week and miles upriver the next.

Jig-and-minnow is the event's signature — a frozen emerald shiner on a 1/4 oz jig drifted along the run; silver jerkbaits and trolled crankbaits take the roaming fish; blade baits under the schools.

The event happens over river mouths and the first miles upriver, warming shallow shorelines, and rocky points where the displaced bait stacks

Next on this water

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

June mayfly hatch (walleye lakes) · mayflyJun 1 – Aug 10 · in ~9 months

Recommendations come from depth structure and seasonal species behavior. Treat them as a starting point, not a guarantee. Contours on this water are approximations. Never use for navigation. Always check local regulations.

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Recent catches at Johns L.

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 Johns L. on the board.

Fishing Johns L.: what the data says

18-acre lake in Bruce County, Ontario. The lake tops out around 10 ft. The chart is a model: real shoreline, published maximum depth, interpolated in between. A planning tool, never a navigation product. What the data behind the map says about each species, season by season:

Drawn out, this is 18 acres of water rimmed by 1.2 miles of bank. Index 2.1 on the shoreline: a few honest points and pockets, nothing labyrinthine. All of it is shallow-zone water — under ~15 ft across the entire basin, so the food chain has the run of the place. End to end it runs roughly 0.4 mi, about 0.2 mi across. You'll find it in Bruce County. For a second option, Boat Lake lies 2 mi northeast.

Brown Trout fishing at Johns L.

Spring brown trout on Johns L. hold shallow, usually 1 to 10 ft. Depth-wise the year is flat: 3 to 10 ft in summer, 1 to 10 ft once it turns cold. The chart's best answer is Break off the point — drop-off, 5 ft, prime for summer. Prime time lands in after dark and early morning. The summer box starts with a spoon at the thermocline or a deep stickbait (night).

Season	Depth	Best window	Start at	Go-to baits
Spring	1 to 10 ft	dawn & dusk	Main-lake point (8 ft)	Stickbait off planer boards (shallow), Small spoon along mud lines
Summer	3 to 10 ft	night & dawn	Break off the point (5 ft)	Spoon at the thermocline, Deep stickbait (night)
Fall	2 to 10 ft	dusk & dawn	Main-lake point (8 ft)	Jerkbait over gravel, Casting spoon
Winter	1 to 10 ft	dawn	Break off the point (5 ft)	Jigging spoon, Small stickbait (slow)

Northern Pike fishing at Johns L.

In spring, northern pike run shallow here, mostly 2 to 8 ft. Midsummer fish sit out in 3 to 10 ft before dropping to 3 to 10 ft for winter. Spring northern pike concentrate at Shallow bay flat, a prime-rated weed flat around 3 ft. Fish it in early morning and the evening and you'll meet the bite. You won't need more than a bucktail or a weedless spoon over cabbage most summer days.

Season	Depth	Best window	Start at	Go-to baits
Spring	2 to 8 ft	midday & dawn	Shallow bay flat (3 ft)	#5 inline spinner, Spoon (red/white)
Summer	3 to 10 ft	dawn & dusk	Shallow bay flat (3 ft)	Bucktail, Weedless spoon over cabbage
Fall	3 to 10 ft	midday & dawn	Shallow bay flat (3 ft)	Big rubber (Bull Dawg style), Husky-style jerkbait
Winter	3 to 10 ft	midday	Shallow bay flat (3 ft)	Tip-ups, Large jigging spoon

Smallmouth Bass fishing at Johns L.

In spring, smallmouth bass run shallow here, mostly 3 to 10 ft. Summer keeps them at 3 to 10 ft, and they winter in 3 to 10 ft. Fall smallmouth bass concentrate at Main-lake point, a prime-rated point around 8 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 10 ft	dawn & dusk	Main-lake point (8 ft)	Ned rig, Tube jig
Summer	3 to 10 ft	dawn & dusk	Break off the point (5 ft)	Drop shot (goby/minnow), Ned rig
Fall	3 to 10 ft	midday & dawn	Main-lake point (8 ft)	Jerkbait, Blade bait
Winter	3 to 10 ft	midday	Break off the point (5 ft)	Blade bait, Hair jig

Largemouth Bass fishing at Johns L.

Spring puts largemouth bass in skinny water — 2 to 10 ft is the zone. Summer fish stay in 3 to 10 ft, and winter fish hold in 3 to 10 ft. Shallow bay flat is the standout, a weed flat at roughly 3 ft, rated prime for spring largemouth bass. Plan around early morning and the evening in the warm months. A texas-rigged 10" worm or a deep-diving crankbait covers the summer program.

Season	Depth	Best window	Start at	Go-to baits
Spring	2 to 10 ft	dawn & dusk	Shallow bay flat (3 ft)	Spinnerbait, Chatterbait
Summer	3 to 10 ft	dawn & dusk	Shallow bay flat (3 ft)	Texas-rigged 10" worm, Deep-diving crankbait
Fall	3 to 10 ft	midday & dawn	Main-lake point (8 ft)	Squarebill crankbait (shad), Spinnerbait
Winter	3 to 10 ft	midday	Break off the point (5 ft)	Blade bait, Jigging spoon

Common Carp fishing at Johns L.

Start shallow in spring: common carp sit in 2 to 10 ft that time of year. They don't go far with the seasons — 2 to 10 ft covers summer, 3 to 10 ft covers winter. The spot to know is Shallow bay flat, a weed flat in about 3 ft of water that rates prime for common carp in spring. Warm-month bites cluster around early morning and the evening.

Season	Depth	Best window	Start at
Spring	2 to 10 ft	midday & dawn	Shallow bay flat (3 ft)
Summer	2 to 10 ft	dawn & dusk	Shallow bay flat (3 ft)
Fall	3 to 10 ft	midday	Shallow bay flat (3 ft)
Winter	3 to 10 ft	midday	Deep basin (9 ft)

Notable structure

Count 4 structure marks on this chart. The deepest, Deep basin, sits near 9 ft.

Deep basin: deep basin, around 9 ft
Main-lake point: point, around 8 ft
Break off the point: drop-off, around 5 ft
Shallow bay flat: weed flat, around 3 ft

Johns L. 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 Johns L. specifically, so confirm the current rules before you fish.

Check the official Ontario fishing regulations →

Common questions

How deep is Johns L.?

Johns L. is about 10 ft (3 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.

What fish are in Johns L.?

Anglers target brown trout, northern pike, smallmouth bass, largemouth bass, common carp on Johns L..

Where is the best fishing spot on Johns L.?

Shallow bay flat is the top-rated area: a weed flat in about 3 ft of water that rates prime for northern pike in spring. The map above holds the full rated-spot list for every species and season.

When is the best time to fish Johns L.?

For brown trout, the summer bite is best in after dark and early morning. 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 Johns L.?

Fishing on Johns L. 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

Boat Lake 2 mi · Spry Lake 3 mi · Amabel L. 3 4 mi · Patterson Lake 4 mi · Hodgins Lake 5 mi · North Hodgins Lake 5 mi · Isaac Lake 5 mi · Shepherd Lake 7 mi · Gould Lake 8 mi · Maryville Lake 8 mi · Sky Lake 8 mi · Berford Lake 8 mi

See how Johns L. stacks up: best largemouth bass lakes in Ontario · best smallmouth bass lakes in Ontario · best northern pike lakes in Ontario · best common carp lakes in Ontario

More water nearby: Bruce County fishing maps (60 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.