Ralston L. Depth Map & Fishing Spots (ON)

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Lake depth chart

Ralston L., ON

Max 43 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 on this water are approximations. Never use for navigation. Always check local regulations.

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Recent catches at Ralston 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 Ralston L. on the board.

Fishing Ralston L.: what the data says

20-acre lake in Parry Sound District, Ontario. The lake tops out around 43 ft. This chart interpolates between a real shoreline and a known maximum depth. It will point you at likely water, but it is not a navigation product. Species by species, here's what the data says the year looks like.

The outline encloses 20 acres, worked by 0.9 miles of shoreline. At index 1.4 the outline is almost a bowl — read the depth changes, not the shoreline. Littoral water — the productive band under ~15 ft — makes up 53% of this chart, as modeled. Tip to tip the water measures near 0.4 mi with a 0.2-mi widest point. Parry Sound District claims this one. Its nearest charted neighbour, Eagle Lake, is 2 mi to the southwest.

Yellow Perch fishing at Ralston L.

In spring, yellow perch run shallow here, mostly 3 to 12 ft. Summer pushes them deeper, 10 to 30 ft, and winter fish settle into 15 to 35 ft. Break off the point is the standout, a drop-off at roughly 19 ft, rated prime for summer yellow perch. Time it for early morning. You won't need more than a drop-shot micro plastics or a small spoon tipped with worm most summer days.

Season	Depth	Best window	Start at	Go-to baits
Spring	3 to 12 ft	midday & dawn	open water	Small jig + curly tail, Perch-pattern micro crank
Summer	10 to 30 ft	dawn	Break off the point (19 ft)	Drop-shot micro plastics, Small spoon tipped with worm
Fall	12 to 35 ft	midday	Deep basin (37 ft)	Jigging spoon (small), Perch rig / spreader
Winter	15 to 35 ft	midday & dawn	Deep basin (37 ft)	Tungsten jig + spikes, Rattle spoon (small)

Notable structure

3 pieces of structure are mapped here — Deep basin, around 37 ft, is the deepest of them.

Deep basin: deep basin, around 37 ft
Break off the point: drop-off, around 19 ft
Main-lake point: point, around 11 ft

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

Check the official Ontario fishing regulations →

Common questions

How deep is Ralston L.?

Ralston L. is about 43 ft (13 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 Ralston L.?

Anglers target yellow perch on Ralston L..

Where is the best fishing spot on Ralston L.?

Break off the point is the top-rated area: a drop-off in about 19 ft of water that rates prime for yellow perch in summer. Scroll up to the map for the complete spot list by species and season.

When is the best time to fish Ralston L.?

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 Ralston L.?

Fishing on Ralston 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

Eagle Lake 2 mi · King Lake 3 mi · Bray Lake 3 mi · Iveys L. 5 mi · Mandeville Lake 6 mi · Deer Lake 6 mi · Louck Lake 6 mi · Bacon Lake 6 mi · Cheer Lake 6 mi · Mud Lake 7 mi · Prospect L. 7 mi · Forest Lake 7 mi

See how Ralston L. stacks up: best yellow perch lakes in Ontario

More water nearby: Parry Sound District fishing maps (441 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.