One Horse Lake Depth Map & Fishing Spots (ON)

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Lake depth chart

One Horse Lake, ON

Max 20 ft

Today's read

Where to start

Fall shiner run window is on — see the hatch outlook

Hatch outlook

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 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 One Horse 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 One Horse Lake on the board.

Fishing One Horse Lake: what the data says

48-acre lake in Algoma District, Ontario. The lake tops out around 20 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 1976, a decades-old survey (an MNRF lake survey). Below is the species-by-species picture, pulled from the same data the map uses.

The outline encloses 48 acres, worked by 1.7 miles of shoreline. A middling shoreline index (1.7) gives it some bays to work without being a maze. Nothing on this chart breaks 15 ft, which makes the whole surface littoral: weeds, bait and ambush cover everywhere. The basin spans about 0.6 mi end to end and 0.2 mi across at its widest. It sits in Algoma District. Two Horse Lake sits 1 mi southeast — the closest neighbouring chart.

Yellow Perch fishing at One Horse Lake

Spring puts yellow perch in skinny water — 3 to 12 ft is the zone. Warm water sends them out to 6 to 20 ft; cold water stacks them in 6 to 20 ft. Deep basin is the standout, a deep basin at roughly 20 ft, rated prime for fall yellow perch. Plan around early morning in the warm months. A drop-shot micro plastics or a small spoon tipped with worm covers the summer program.

Season	Depth	Best window	Start at	Go-to baits
Spring	3 to 12 ft	midday & dawn	Shallow bay flat (1 ft)	Small jig + curly tail, Perch-pattern micro crank
Summer	6 to 20 ft	dawn	Deep basin (20 ft)	Drop-shot micro plastics, Small spoon tipped with worm
Fall	6 to 20 ft	midday	Deep basin (20 ft)	Jigging spoon (small), Perch rig / spreader
Winter	6 to 20 ft	midday & dawn	Deep basin (20 ft)	Tungsten jig + spikes, Rattle spoon (small)

Notable structure

One Horse Lake carries 6 mapped structure features, topping out (or rather bottoming out) at Deep basin, about 20 ft down.

Deep basin: deep basin, around 20 ft
Break off the point: drop-off, around 3 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

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

Check the official Ontario fishing regulations →

Common questions

How deep is One Horse Lake?

One Horse Lake is about 20 ft (6 m) deep at its deepest point. The depth data here comes from the Ontario MNRF survey of 1976, a decades-old survey (an MNRF lake survey).

What fish are in One Horse Lake?

Anglers target yellow perch on One Horse Lake.

Where is the best fishing spot on One Horse Lake?

Deep basin is the top-rated area: a deep basin in about 20 ft of water that rates prime for yellow perch in fall. Scroll up to the map for the complete spot list by species and season.

When is the best time to fish One Horse Lake?

For yellow perch, the summer bite is best in 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 One Horse Lake?

Fishing on One Horse 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

Two Horse Lake 1 mi · Hart Lake 2 mi · Iron Lake 3 mi · Peter Lake 3 mi · Edith L. 3 mi · Lonely Lake 4 mi · McMahon Lake 4 mi · Bass Lake 4 mi · Tower Lake 5 mi · Echo Lake 5 mi · Chipman Lake 5 mi · Patten Lake 6 mi

See how One Horse Lake stacks up: best yellow perch 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.