Jarvis L. 9 Depth Map & Fishing Spots (ON)

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 here are interpolated from real agency depth surveys (state DNR / USACE). Never use for navigation. Always check local regulations.

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Recent catches at Jarvis L. 9

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 Jarvis L. 9 on the board.

Fishing Jarvis L. 9: what the data says

32-acre lake in Algoma District, Ontario. The lake tops out around 59 ft. The depth data here comes from the Ontario MNRF survey of 2021 (an MNRF lake survey). Below is the species-by-species picture, pulled from the same data the map uses.

The drawn water covers 33 acres wrapped in 1.6 miles of bank, with 2 islands in the mix. With a 1.9 development index there's bank structure worth casting at, in moderation. 40% of the surface is littoral (under ~15 ft) — cover, weeds and forage water. Tip to tip the water measures near 0.4 mi with a 0.3-mi widest point. Algoma District claims this one. If the bite dies, Brilliant Lake is 0 mi to the northeast.

Brook Trout fishing at Jarvis L. 9

Spring brook trout on Jarvis L. 9 hold shallow, usually 2 to 15 ft. They move out to 10 to 30 ft in summer and finish the year down in 3 to 20 ft. Put Break off the point first on the milk run — a drop-off near 10 ft that grades prime for summer. The feeding windows run early morning and the evening. The summer box starts with a small spoon fished deep or a trolled lake-clear wobbler + worm.

Season	Depth	Best window	Start at	Go-to baits
Spring	2 to 15 ft	dawn & dusk	Main-lake point (5 ft)	Small inline spinner (gold), Tiny spoon
Summer	10 to 30 ft	dawn & dusk	Break off the point (10 ft)	Small spoon fished deep, Trolled lake-clear wobbler + worm
Fall	2 to 15 ft	midday & dawn	Main-lake point (5 ft)	Small spoon (orange), Spinner
Winter	3 to 20 ft	dawn	Break off the point (10 ft)	Small jigging spoon, Tungsten jig + plastic

Notable structure

Count 5 structure marks on this chart. The deepest, Deep basin, sits near 56 ft.

Deep basin: deep basin, around 56 ft
Break off the point: drop-off, around 10 ft
Shallow bay flat: weed flat, around 8 ft
Main-lake point: point, around 5 ft
Secondary point: point, around 2 ft

Jarvis L. 9 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 Jarvis L. 9 specifically, so confirm the current rules before you fish.

Check the official Ontario fishing regulations →

Common questions

How deep is Jarvis L. 9?

Jarvis L. 9 is about 59 ft (18 m) deep at its deepest point. The depth data here comes from the Ontario MNRF survey of 2021 (an MNRF lake survey).

What fish are in Jarvis L. 9?

Anglers target brook trout on Jarvis L. 9.

Where is the best fishing spot on Jarvis L. 9?

Break off the point is the top-rated area: a drop-off in about 10 ft of water that rates prime for brook trout in summer. Open the map above to see every rated spot for each species and season.

When is the best time to fish Jarvis L. 9?

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 Jarvis L. 9?

Fishing on Jarvis L. 9 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

Brilliant Lake 0 mi · Jarvis Lake 1 mi · Kaufman Lake 1 mi · Lost Loon Lake 1 mi · Reserve Lake 2 mi · Christman L. 2 mi · Weashkog L. 2 mi · Unnamed Lake 2 mi · Phelbin L. 2 mi · Fillion L. 2 mi · Crooked Lakes 2 mi · Legge Lake 3 mi

See how Jarvis L. 9 stacks up: best brook trout lakes in Ontario

More water nearby: Algoma District fishing maps (1026 charts). Browse all Ontario fishing maps or see every water on DepthScout. Bathymetry credit: state fisheries survey programs. 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.