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33-acre lake in Nipissing District, Ontario. The lake tops out around 25 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 1973, a decades-old survey (an MNRF lake survey). Every species below gets its seasonal read from the same numbers driving the chart.
The drawn water covers 33 acres wrapped in 1.5 miles of bank. With a 1.9 development index there's bank structure worth casting at, in moderation. Call it 0.6 mi long by 0.2 mi wide at the broadest reach. It sits in Nipissing District. Its nearest charted neighbour, Troutbait Lake, is 1 mi to the southeast.
Early season brook trout use the shallows, holding in 2 to 15 ft. Expect a summer slide to 8 to 25 ft, then a winter hold in 3 to 20 ft. Put Deep basin first on the milk run — a deep basin near 14 ft that grades prime for summer. In summer the feeding windows fall in early morning and the evening. Tie on a small spoon fished deep or a trolled lake-clear wobbler + worm and you're in the game.
| 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 | 8 to 25 ft | dawn & dusk | Deep basin (14 ft) | 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 | Deep basin (14 ft) | Small jigging spoon, Tungsten jig + plastic |
The chart marks 5 structure features on Otter Lake; the deepest is Deep basin at about 14 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 Otter Lake specifically, so confirm the current rules before you fish.
Check the official Ontario fishing regulations →
Otter Lake is about 25 ft (8 m) deep at its deepest point. The depth data here comes from the Ontario MNRF survey of 1973, a decades-old survey (an MNRF lake survey).
Anglers target brook trout on Otter Lake.
Deep basin is the top-rated area: a deep basin in about 14 ft of water that rates prime for brook trout in summer. Scroll up to the map for the complete spot list by 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 Otter 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.
Troutbait Lake 1 mi · Big Webb Lake 1 mi · Emerald Lake 2 mi · Little Webb Lake 2 mi · Green Lake 3 mi · Round Lake 3 mi · Cut Lake 4 mi · Shanty Lake 4 mi · Orient Lake 4 mi · Spring Lake 4 mi · Camp Lake 4 mi · Biber Lake 5 mi
See how Otter Lake stacks up: 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.