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25-acre lake in Algoma District, Ontario. The lake tops out around 60 ft. The depth chart comes from Ontario Ministry of Natural Resources and Forestry bathymetric survey data, so the contours are survey-derived rather than computer-modeled. The depth data here comes from the Ontario MNRF survey of 2006 (a transect sounding survey). The season-by-season read for each species follows, from the map's own numbers.
The outline encloses 25 acres, worked by 1.1 miles of shoreline. With a 1.6 development index there's bank structure worth casting at, in moderation. The shallow band under 15 ft claims about 51% of the surface — that's where the groceries are. Call it 0.4 mi long by 0.2 mi wide at the broadest reach. Algoma District claims this one. Ed Frazer Lake sits 1 mi west — the closest neighbouring chart.
Spring brook trout on John Run L. 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 22 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 (7 ft) | Small inline spinner (gold), Tiny spoon |
| Summer | 10 to 30 ft | dawn & dusk | Break off the point (22 ft) | Small spoon fished deep, Trolled lake-clear wobbler + worm |
| Fall | 2 to 15 ft | midday & dawn | Main-lake point (7 ft) | Small spoon (orange), Spinner |
| Winter | 3 to 20 ft | dawn | Shallow bay flat (9 ft) | Small jigging spoon, Tungsten jig + plastic |
Structure-wise the chart holds 5 features, led in depth by Deep basin at roughly 59 ft.
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 John Run L. specifically, so confirm the current rules before you fish.
Check the official Ontario fishing regulations →
John Run L. is about 60 ft (18 m) deep at its deepest point. The depth data here comes from the Ontario MNRF survey of 2006 (a transect sounding survey).
Anglers target brook trout on John Run L..
Break off the point is the top-rated area: a drop-off in about 22 ft of water that rates prime for brook trout in summer. The map above holds the full rated-spot list for every species and season.
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.
Fishing on John Run 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.
Ed Frazer Lake 1 mi · Robb Lake 1 mi · Elbow Lake 2 mi · Skating Logger Lake 2 mi · Town Line Lake 2 mi · Virginia L. 2 mi · White Bear Lake 3 mi · Maquire L. 3 mi · Barr Lake 3 mi · Roy Berry L. 3 mi · Fox L. (Sayer L. 48) 3 mi · Finn Lake 3 mi
See how John Run L. 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: published agency survey data. 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.