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275-acre lake in Cochrane District, Ontario. The lake tops out around 56 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 1979, a decades-old survey (an MNRF lake survey). The season-by-season read for each species follows, from the map's own numbers.
On the chart, L. 20F-113 draws 275 acres inside 6.9 miles of shoreline. With a shoreline index of 3, this water is all arms and coves — edge habitat well beyond its acreage. 92% of the surface is littoral (under ~15 ft) — cover, weeds and forage water. The basin spans about 1.7 mi end to end and 0.8 mi across at its widest. The water lies in Cochrane District. The nearest mapped water is Today Lake, 2 mi to the east.
Spring cisco (lake herring) on L. 20F-113 hold shallow, usually 10 to 40 ft. By summer they slide out to 17 to 56 ft, and by winter most fish are in 17 to 56 ft. The chart's best answer is Deep basin — deep basin, 43 ft, prime for summer. Prime time lands in early morning. The summer box starts with a vertical flutter spoon (small) or a drop-shot micro plastic.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 10 to 40 ft | dawn & dusk | Deep basin (43 ft) | Small silver spoon, Tiny swim jig (white) |
| Summer | 17 to 56 ft | dawn | Deep basin (43 ft) | Vertical flutter spoon (small), Drop-shot micro plastic |
| Fall | 5 to 25 ft | dusk & dawn | Break off the point (1 ft) | Small casting spoon, Inline spinner (silver) |
| Winter | 17 to 56 ft | dawn | Deep basin (43 ft) | Small jigging spoon (glow/silver), Tungsten jig + minnow head |
When the water first warms, yellow perch slide up into 3 to 12 ft. By summer they slide out to 10 to 30 ft, and by winter most fish are in 15 to 35 ft. If you only fish one area, make it Shallow feeding flat: a feeding flat around 12 ft that scores prime in spring. In summer the feeding windows fall in early morning. Keep a drop-shot micro plastics or a small spoon tipped with worm rigged through the warm months.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 12 ft | midday & dawn | Shallow feeding flat (12 ft) | Small jig + curly tail, Perch-pattern micro crank |
| Summer | 10 to 30 ft | dawn | Shallow feeding flat (12 ft) | Drop-shot micro plastics, Small spoon tipped with worm |
| Fall | 12 to 35 ft | midday | Deep basin (43 ft) | Jigging spoon (small), Perch rig / spreader |
| Winter | 15 to 35 ft | midday & dawn | Deep basin (43 ft) | Tungsten jig + spikes, Rattle spoon (small) |
The spring pattern is a shallow one: northern pike in 2 to 8 ft. As the season builds they drop to 8 to 20 ft, wintering in 5 to 15 ft. Top water on the chart: Shallow bay flat, a weed flat in the 1 ft range, prime in spring. Time it for early morning and the evening. Summer baits: a bucktail or a weedless spoon over cabbage gets it done.
| 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 | Shallow feeding flat (12 ft) | Bucktail, Weedless spoon over cabbage |
| Fall | 6 to 18 ft | midday & dawn | Shallow feeding flat (12 ft) | Big rubber (Bull Dawg style), Husky-style jerkbait |
| Winter | 5 to 15 ft | midday | Shallow feeding flat (12 ft) | Tip-ups, Large jigging spoon |
Count 7 structure marks on this chart. The deepest, Deep basin, sits near 43 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 L. 20F-113 specifically, so confirm the current rules before you fish.
Check the official Ontario fishing regulations →
L. 20F-113 is about 56 ft (17 m) deep at its deepest point. The depth data here comes from the Ontario MNRF survey of 1979, a decades-old survey (an MNRF lake survey).
Anglers target cisco (lake herring), yellow perch, northern pike on L. 20F-113.
Deep basin is the top-rated area: a deep basin in about 43 ft of water that rates prime for cisco (lake herring) in summer. The map above holds the full rated-spot list for every species and season.
For cisco (lake herring), 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.
Fishing on L. 20F-113 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.
Today Lake 2 mi · Yesterday Lake 2 mi · L. 19F-76 4 mi · L. 20G-134 6 mi · Sand Lake 7 mi · Little Wakwayowkastic Lake 9 mi · Hills L. 9 mi · 21G-105, L. 10 mi · Echo L. 12 mi · L. 19E-62 13 mi · Lake 19E-72 14 mi · 21G-15, L. 18 mi
See how L. 20F-113 stacks up: best northern pike lakes in Ontario · best yellow perch lakes in Ontario · best cisco (lake herring) lakes in Ontario
More water nearby: Cochrane District fishing maps (673 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.