Marquardt Lake Depth Map & Fishing Spots (ON)

Skip to interactive depth chart

Lake depth chart

Marquardt Lake, ON

Max 39 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

Next on this water

Spring bug season (brook trout lakes) · forageApr 25 – Jun 30 · in ~8 months

Hex (giant mayfly) · mayflyMay 25 – 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.

Loading depth chart…

Recent catches at Marquardt 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 Marquardt Lake on the board.

Fishing Marquardt Lake: what the data says

7-acre lake in Renfrew County, Ontario. The lake tops out around 39 ft. These contours are modeled — built from the real shoreline and the water's maximum depth — so read them as a guide, never as navigation. What follows comes from the same scoring engine that paints the spots above.

On the chart, Marquardt Lake draws 7 acres inside 0.5 miles of shoreline. At index 1.4 the outline is almost a bowl — read the depth changes, not the shoreline. The shallow band under 15 ft claims about 36% of the surface on the model — that's where the groceries are. The water lies in Renfrew County. The nearest mapped water is Raglan White Lake, 1 mi to the northwest.

Brook Trout fishing at Marquardt Lake

Start shallow in spring: brook trout sit in 2 to 15 ft that time of year. Warm water sends them out to 10 to 30 ft; cold water stacks them in 3 to 20 ft. Top water on the chart: Break off the point, a drop-off in the 18 ft range, prime in summer. Fish it in early morning and the evening and you'll meet the bite. Throw a small spoon fished deep or a trolled lake-clear wobbler + worm until the fish tell you otherwise.

Season	Depth	Best window	Start at	Go-to baits
Spring	2 to 15 ft	dawn & dusk	Main-lake point (10 ft)	Small inline spinner (gold), Tiny spoon
Summer	10 to 30 ft	dawn & dusk	Break off the point (18 ft)	Small spoon fished deep, Trolled lake-clear wobbler + worm
Fall	2 to 15 ft	midday & dawn	Main-lake point (10 ft)	Small spoon (orange), Spinner
Winter	3 to 20 ft	dawn	Break off the point (18 ft)	Small jigging spoon, Tungsten jig + plastic

Brown Bullhead fishing at Marquardt Lake

The spring pattern is a shallow one: brown bullhead in 2 to 8 ft. As the season builds they drop to 3 to 12 ft, wintering in 10 to 25 ft. Top water on the chart: Deep basin, a deep basin in the 33 ft range, good in winter. Time it for after dark and the evening.

Season	Depth	Best window	Start at
Spring	2 to 8 ft	dusk & night	open water
Summer	3 to 12 ft	night & dusk	open water
Fall	5 to 15 ft	dusk	open water
Winter	10 to 25 ft	midday	Deep basin (33 ft)

Notable structure

Count 3 structure marks on this chart. The deepest, Deep basin, sits near 33 ft.

Deep basin: deep basin, around 33 ft
Break off the point: drop-off, around 18 ft
Main-lake point: point, around 10 ft

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

Check the official Ontario fishing regulations →

Common questions

How deep is Marquardt Lake?

Marquardt Lake is about 39 ft (12 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 Marquardt Lake?

Anglers target brook trout, brown bullhead on Marquardt Lake.

Where is the best fishing spot on Marquardt Lake?

Break off the point is the top-rated area: a drop-off in about 18 ft of water that rates prime for brook trout in summer. The interactive chart above rates every spot for each species and season.

When is the best time to fish Marquardt Lake?

For brook trout, 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 Marquardt Lake?

Fishing on Marquardt 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

Raglan White Lake 1 mi · Moccasin Lake 2 mi · Leidtke Lake 2 mi · Genricks Lake 4 mi · Lower Leidtke Lake 4 mi · Hardwood Lake 5 mi · Kennellys Lake 5 mi · Cameron Lake 6 mi · Stringers Lake 6 mi · Beeches Lake 6 mi · Shanty Lake 7 mi · Negeek Lake 7 mi

See how Marquardt Lake stacks up: best brook trout lakes in Ontario · best brown bullhead lakes in Ontario

More water nearby: Renfrew County fishing maps (298 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.