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66-acre lake in Nipissing District, Ontario. The lake tops out around 61 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 1969, a decades-old survey (an MNRF lake survey). Species by species, here's what the data says the year looks like.
Olmstead Lake maps at 66 acres behind 2.1 miles of shoreline. With a 1.8 development index there's bank structure worth casting at, in moderation. Littoral water — the productive band under ~15 ft — makes up 67% of this chart. Call it 0.9 mi long by 0.2 mi wide at the broadest reach. It sits in Nipissing District. If the bite dies, Cahill Lake is 1 mi to the south.
Spring brook trout on Olmstead Lake hold shallow, usually 2 to 15 ft. By summer they slide out to 10 to 30 ft, and by winter most fish are in 3 to 20 ft. The chart's best answer is Main-lake point — point, 1 ft, prime for spring. Prime time lands in 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 (1 ft) | Small inline spinner (gold), Tiny spoon |
| Summer | 10 to 30 ft | dawn & dusk | open water | Small spoon fished deep, Trolled lake-clear wobbler + worm |
| Fall | 2 to 15 ft | midday & dawn | Main-lake point (1 ft) | Small spoon (orange), Spinner |
| Winter | 3 to 20 ft | dawn | Shallow bay flat (1 ft) | Small jigging spoon, Tungsten jig + plastic |
Start shallow in spring: yellow perch sit in 3 to 12 ft that time of year. Warm water sends them out to 10 to 30 ft; cold water stacks them in 15 to 35 ft. Top water on the chart: Shallow bay flat, a weed flat in the 1 ft range, prime in spring. Fish it in early morning and you'll meet the bite. Throw a drop-shot micro plastics or a small spoon tipped with worm until the fish tell you otherwise.
| 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 | 10 to 30 ft | dawn | Deep basin (60 ft) | Drop-shot micro plastics, Small spoon tipped with worm |
| Fall | 12 to 35 ft | midday | Break off the point (40 ft) | Jigging spoon (small), Perch rig / spreader |
| Winter | 15 to 35 ft | midday & dawn | Deep basin (60 ft) | Tungsten jig + spikes, Rattle spoon (small) |
Count 6 structure marks on this chart. The deepest, Deep basin, sits near 60 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 Olmstead Lake specifically, so confirm the current rules before you fish.
Check the official Ontario fishing regulations →
Olmstead Lake is about 61 ft (19 m) deep at its deepest point. The depth data here comes from the Ontario MNRF survey of 1969, a decades-old survey (an MNRF lake survey).
Anglers target brook trout, yellow perch on Olmstead Lake.
Shallow bay flat is the top-rated area: a weed flat in about 1 ft of water that rates prime for yellow perch in spring. 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 Olmstead 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.
Cahill Lake 1 mi · Chime Lake 1 mi · Teesdale Lake 1 mi · Perron Lake 2 mi · Bell Lake 2 mi · Gauvreau Lake 2 mi · Glassy Lake 3 mi · Talon Lake 4 mi · Green Lake 5 mi · Tilliard Lake 5 mi · Pine Lake 6 mi · Wright Lake 6 mi
See how Olmstead Lake stacks up: best yellow perch lakes in Ontario · best brook trout lakes in Ontario
More water nearby: Nipissing District fishing maps (683 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.