Alston Lake Depth Map & Fishing Spots (ON)

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Lake depth chart

Alston Lake, ON

Max 45 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 Alston 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 Alston Lake on the board.

Fishing Alston Lake: what the data says

30-acre lake in Sudbury District, Ontario. The lake tops out around 45 ft. What you see is a modeled chart: the shoreline is real, the max depth is published, and the contours between are estimated. Plan with it; don't navigate by it. Here is how the season plays out for each species, straight from the data behind the map.

Drawn out, this is 29 acres of water rimmed by 1.2 miles of bank. The shoreline is moderately structured (index 1.6) — enough points and pockets to pattern. Roughly 32% of the water is 15 ft or less as modeled, the band where the food chain lives. Tip to tip the water measures near 0.4 mi with a 0.2-mi widest point. The water lies in Sudbury District. The nearest mapped water is Banana Lake, 1 mi to the northeast.

Smallmouth Bass fishing at Alston Lake

Start shallow in spring: smallmouth bass sit in 3 to 12 ft that time of year. Summer pushes them deeper, 10 to 30 ft, and winter fish settle into 20 to 45 ft. The spot to know is Main-lake point, a point in about 11 ft of water that rates prime for smallmouth bass in fall. Warm-month bites cluster around early morning and the evening. Throw a drop shot (goby/minnow) or a ned rig until the fish tell you otherwise.

Season	Depth	Best window	Start at	Go-to baits
Spring	3 to 12 ft	dawn & dusk	Main-lake point (11 ft)	Ned rig, Tube jig
Summer	10 to 30 ft	dawn & dusk	Break off the point (20 ft)	Drop shot (goby/minnow), Ned rig
Fall	8 to 25 ft	midday & dawn	Main-lake point (11 ft)	Jerkbait, Blade bait
Winter	20 to 45 ft	midday	Break off the point (20 ft)	Blade bait, Hair jig

Notable structure

Alston Lake carries 4 mapped structure features, topping out (or rather bottoming out) at Deep basin, about 38 ft down.

Deep basin: deep basin, around 38 ft
Break off the point: drop-off, around 20 ft
Main-lake point: point, around 11 ft
Shallow bay flat: weed flat, around 5 ft

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

Check the official Ontario fishing regulations →

Common questions

How deep is Alston Lake?

Alston Lake is about 45 ft (14 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 Alston Lake?

Anglers target smallmouth bass on Alston Lake.

Where is the best fishing spot on Alston Lake?

Main-lake point is the top-rated area: a point in about 11 ft of water that rates prime for smallmouth bass in fall. Every other rated spot, per species and season, is on the map above.

When is the best time to fish Alston Lake?

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 Alston Lake?

Fishing on Alston 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

Banana Lake 1 mi · Gale Lake 4 mi · Nagasin Lake 4 mi · Suomi Lake 5 mi · Highbrush Lake 6 mi · Crescent Lake 6 mi · Chappise L. 59 7 mi · Chappise L. 58 7 mi · Sideburned Lake 7 mi · Sample Lake 7 mi · Antler Lake 7 mi · Tenor Lake 8 mi

See how Alston Lake stacks up: best smallmouth bass lakes in Ontario

More water nearby: Sudbury District fishing maps (868 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.