L. 12F-12 Depth Map & Fishing Spots (ON)

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Lake depth chart

L. 12F-12, ON

Max 80 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

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 L. 12F-12

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 L. 12F-12 on the board.

Fishing L. 12F-12: what the data says

44-acre lake in Cochrane District, Ontario. The lake tops out around 80 ft. Depth here is modeled from the true shoreline and max depth rather than surveyed; use it to plan, not to navigate. What the data behind the map says about each species, season by season:

The outline encloses 43 acres, worked by 2 miles of shoreline. A middling shoreline index (2.1) gives it some bays to work without being a maze. 39% of the surface is littoral (under ~15 ft), per the model — cover, weeds and forage water. End to end it runs roughly 0.6 mi, about 0.3 mi across. It sits in Cochrane District. Its nearest charted neighbour, Hall Lake, is 1 mi to the northwest.

Smallmouth Bass fishing at L. 12F-12

Early season smallmouth bass use the shallows, holding in 3 to 12 ft. Summer is a 10 to 30 ft game here, winter a 20 to 45 ft one. The chart's best answer is Main-lake point — point, 20 ft, prime for fall. Best bite is early morning and the evening. Tie on a drop shot (goby/minnow) or a ned rig and you're in the game.

Season	Depth	Best window	Start at	Go-to baits
Spring	3 to 12 ft	dawn & dusk	open water	Ned rig, Tube jig
Summer	10 to 30 ft	dawn & dusk	Main-lake point (20 ft)	Drop shot (goby/minnow), Ned rig
Fall	8 to 25 ft	midday & dawn	Main-lake point (20 ft)	Jerkbait, Blade bait
Winter	20 to 45 ft	midday	Break off the point (36 ft)	Blade bait, Hair jig

Notable structure

The chart marks 5 structure features on L. 12F-12; the deepest is Deep basin at about 68 ft.

Deep basin: deep basin, around 68 ft
Break off the point: drop-off, around 36 ft
Main-lake point: point, around 20 ft
Secondary point: point, around 20 ft
Shallow bay flat: weed flat, around 6 ft

L. 12F-12 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 L. 12F-12 specifically, so confirm the current rules before you fish.

Check the official Ontario fishing regulations →

Common questions

How deep is L. 12F-12?

L. 12F-12 is about 80 ft (24 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 L. 12F-12?

Anglers target smallmouth bass on L. 12F-12.

Where is the best fishing spot on L. 12F-12?

Main-lake point is the top-rated area: a point in about 20 ft of water that rates prime for smallmouth bass in fall. Scroll up to the map for the complete spot list by species and season.

When is the best time to fish L. 12F-12?

For smallmouth bass, 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 L. 12F-12?

Fishing on L. 12F-12 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

Hall Lake 1 mi · L. 12F-6 1 mi · Carman Lake 1 mi · Beth Lake 2 mi · Froude L. 2 mi · Redpine L. 3 mi · Reaume Lake 4 mi · Else L. 4 mi · Verte L. 5 mi · Paddy L. 5 mi · O'Malley Lake 5 mi · Crickard Lake 6 mi

See how L. 12F-12 stacks up: best smallmouth bass lakes in Ontario

More water nearby: Cochrane District fishing maps (673 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.