Fifteen Mile Lake Depth Map & Fishing Spots (ON)

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Lake depth chart

Fifteen Mile Lake, ON

Max 108 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

Rainbow smelt run · baitfishApr 1 – May 25 · in ~7 months

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 Fifteen Mile 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 Fifteen Mile Lake on the board.

Fishing Fifteen Mile Lake: what the data says

204-acre lake in Muskoka District Municipality, Ontario. The lake tops out around 108 ft. The depth picture is modeled, anchored to the true shoreline and the water's published max depth — a scouting aid, never a chart to run a boat by. Here's the year, species by species, as the scoring engine sees it.

On the chart, Fifteen Mile Lake draws 204 acres inside 4.6 miles of shoreline. The 2.3 development index tells the story — a convoluted bank whose fishable edge far outruns the acreage. The shallow band under 15 ft claims about 18% of the surface on the model — that's where the groceries are. End to end it runs roughly 1 mi, about 0.8 mi across. You'll find it in Muskoka District Municipality. For a second option, Sixteen Mile Lake lies 1 mi north.

Lake Trout fishing at Fifteen Mile Lake

The spring pattern is a shallow one: lake trout in 10 to 40 ft. Midsummer fish sit out in 32 to 108 ft before dropping to 20 to 80 ft for winter. The spot to know is Deep basin, a deep basin in about 92 ft of water that rates prime for lake trout in summer. Plan around early morning in the warm months. Summer baits: a white tube jig (deep) or a magnum spoon on downrigger gets it done.

Season	Depth	Best window	Start at	Go-to baits
Spring	10 to 40 ft	dawn & dusk	Main-lake point (27 ft)	Casting spoon over shoals, Jerkbait (shallow)
Summer	32 to 108 ft	dawn	Deep basin (92 ft)	White tube jig (deep), Magnum spoon on downrigger
Fall	10 to 50 ft	dusk & dawn	Main-lake point (27 ft)	Heavy casting spoon, Jigging rap over reefs
Winter	20 to 80 ft	dawn	Break off the point (49 ft)	White tube jig, Airplane jig

Smallmouth Bass fishing at Fifteen Mile Lake

In spring, smallmouth bass run shallow here, mostly 3 to 12 ft. Midsummer fish sit out in 10 to 30 ft before dropping to 20 to 45 ft for winter. Fall smallmouth bass concentrate at Main-lake point, a prime-rated point around 27 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 12 ft	dawn & dusk	open water	Ned rig, Tube jig
Summer	10 to 30 ft	dawn & dusk	Main-lake point (27 ft)	Drop shot (goby/minnow), Ned rig
Fall	8 to 25 ft	midday & dawn	Main-lake point (27 ft)	Jerkbait, Blade bait
Winter	20 to 45 ft	midday	Break off the point (49 ft)	Blade bait, Hair jig

Notable structure

Structure-wise the chart holds 6 features, led in depth by Deep basin at roughly 92 ft.

Deep basin: deep basin, around 92 ft
Break off the point: drop-off, around 49 ft
Main-lake point: point, around 27 ft
Secondary point: point, around 27 ft
Shallow bay flat: feeding flat, around 6 ft
Back-bay flat: feeding flat, around 6 ft

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

Check the official Ontario fishing regulations →

Common questions

How deep is Fifteen Mile Lake?

Fifteen Mile Lake is about 108 ft (33 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 Fifteen Mile Lake?

Anglers target lake trout, smallmouth bass on Fifteen Mile Lake.

Where is the best fishing spot on Fifteen Mile Lake?

Deep basin is the top-rated area: a deep basin in about 92 ft of water that rates prime for lake trout in summer. The interactive chart above rates every spot for each species and season.

When is the best time to fish Fifteen Mile Lake?

For lake trout, 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 Fifteen Mile Lake?

Fishing on Fifteen Mile 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

Sixteen Mile Lake 1 mi · Wilson Lake 1 mi · Burns Lake 1 mi · Seventeen Mile Lake 2 mi · Cooper Lake 2 mi · Eiler Lake 2 mi · Flaherty Lake 2 mi · Eighteen Mile Lake 2 mi · Oxtongue Lake 2 mi · Cache Road Lake 2 mi · Crotch Lake 3 mi · Wilbur Lake 3 mi

See how Fifteen Mile Lake stacks up: best smallmouth bass lakes in Ontario · best lake trout lakes in Ontario

More water nearby: Muskoka District Municipality fishing maps (276 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.