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215-acre lake in Kenora District, Ontario. The lake tops out around 28 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 1984 (an MNRF lake survey). Here is how the season plays out for each species, straight from the data behind the map.
Flash Lake maps at 214 acres behind 3.9 miles of shoreline, with a single island in the mix. With a 1.9 development index there's bank structure worth casting at, in moderation. About 93% of the surface sits shallower than 15 ft — that's the weed-and-bait zone. End to end it runs roughly 1.1 mi, about 0.7 mi across. Kenora District claims this one. If the bite dies, Standard Lake is 2 mi to the south.
In spring, walleye run shallow here, mostly 4 to 15 ft. Summer pushes them deeper, 8 to 28 ft, and winter fish settle into 8 to 28 ft. Deep basin is the standout, a deep basin at roughly 26 ft, rated prime for winter walleye. Time it for the evening and early morning. You won't need more than a crawler harness on bottom bouncer or a deep crankbait (trolled) most summer days.
Depth note: when a documented seasonal range extends below this chart, the table shows the deepest mapped working water, not a verified holding depth.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 4 to 15 ft | dusk & dawn | Secondary point (2 ft) | 1/8 oz jig + minnow, Hair jig |
| Summer | 8 to 28 ft chart-limited; documented 15 to 35 ft | dusk & dawn | Deep basin (26 ft) | Crawler harness on bottom bouncer, Deep crankbait (trolled) |
| Fall | 8 to 28 ft chart-limited; documented 12 to 40 ft | dusk & night | Deep basin (26 ft) | Jigging rap, Jig + big minnow |
| Winter | 8 to 28 ft chart-limited; documented 20 to 40 ft | dusk & dawn | Deep basin (26 ft) | Jigging spoon + minnow head, Rattle bait |
The spring pattern is a shallow one: yellow perch in 3 to 12 ft. As the season builds they drop to 8 to 28 ft, wintering in 8 to 28 ft. Top water on the chart: Deep basin, a deep basin in the 26 ft range, prime in fall. Time it for early morning. Summer baits: a drop-shot micro plastics or a small spoon tipped with worm gets it done.
Depth note: when a documented seasonal range extends below this chart, the table shows the deepest mapped working water, not a verified holding depth.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 12 ft | midday & dawn | Shallow bay flat (1 ft) | Small jig + curly tail, Perch-pattern micro crank |
| Summer | 8 to 28 ft chart-limited; documented 10 to 30 ft | dawn | Deep basin (26 ft) | Drop-shot micro plastics, Small spoon tipped with worm |
| Fall | 8 to 28 ft chart-limited; documented 12 to 35 ft | midday | Deep basin (26 ft) | Jigging spoon (small), Perch rig / spreader |
| Winter | 8 to 28 ft chart-limited; documented 15 to 35 ft | midday & dawn | Deep basin (26 ft) | Tungsten jig + spikes, Rattle spoon (small) |
When the water first warms, northern pike slide up into 2 to 8 ft. By summer they slide out to 8 to 20 ft, and by winter most fish are in 5 to 15 ft. If you only fish one area, make it Shallow bay flat: a weed flat around 1 ft that scores prime in spring. In summer the feeding windows fall in early morning and the evening. Keep a bucktail or a weedless spoon over cabbage rigged through the warm months.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 8 ft | midday & dawn | Shallow bay flat (1 ft) | #5 inline spinner, Spoon (red/white) |
| Summer | 8 to 20 ft | dawn & dusk | open water | Bucktail, Weedless spoon over cabbage |
| Fall | 6 to 18 ft | midday & dawn | Break off the point (2 ft) | Big rubber (Bull Dawg style), Husky-style jerkbait |
| Winter | 5 to 15 ft | midday | Shallow bay flat (1 ft) | Tip-ups, Large jigging spoon |
6 pieces of structure are mapped here — Deep basin, around 26 ft, is the deepest of them.
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 Flash Lake specifically, so confirm the current rules before you fish.
Check the official Ontario fishing regulations →
Flash Lake is about 28 ft (9 m) deep at its deepest point. The depth data here comes from the Ontario MNRF survey of 1984 (an MNRF lake survey).
Anglers target walleye, yellow perch, northern pike on Flash Lake.
Deep basin is the top-rated area: a deep basin in about 26 ft of water that rates prime for walleye in winter. Scroll up to the map for the complete spot list by species and season.
For walleye, the summer bite is best in the evening and early morning. Each species page section below lists the seasonal windows, and the map shows a live NOW badge when you're inside one.
Fishing on Flash 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.
Standard Lake 2 mi · Walk Lake 5 mi · Store Lake 6 mi · Theatre Lake 6 mi · Horse Lake 6 mi · Lamour Lake 8 mi · Dimock Lake 8 mi · Tully Lake 9 mi · Dagmar Lake 10 mi · Bump Lake 10 mi · Valdy Lake 10 mi · Antenna Lake 11 mi
See how Flash Lake stacks up: best walleye lakes in Ontario · best northern pike lakes in Ontario · best yellow perch lakes in Ontario
More water nearby: Kenora District fishing maps (1173 charts). Browse all Ontario fishing maps. 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.