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12-acre lake in Nipissing District, Ontario. The lake tops out around 49 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 1968, a decades-old survey (an MNRF lake survey). The season-by-season read for each species follows, from the map's own numbers.
The outline encloses 12 acres, worked by 0.6 miles of shoreline. A shoreline index of 1.2 says round and simple: fish relate to depth changes here, not shoreline features. Roughly 71% of the water is 15 ft or less, the band where the food chain lives. Figure 0.3 mi of water from one end to the other. It sits in Nipissing District. Susy Lake sits 1 mi southwest — the closest neighbouring chart.
Come spring, look for brook trout tight to the bank in 2 to 15 ft. Expect a summer slide to 10 to 30 ft, then a winter hold in 3 to 20 ft. Start at Back-bay flat. It's a weed flat holding about 2 ft of water and rates good come spring. Prime time lands in early morning and the evening. A small spoon fished deep or a trolled lake-clear wobbler + worm is the honest summer answer here.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 15 ft | dawn & dusk | Back-bay flat (2 ft) | Small inline spinner (gold), Tiny spoon |
| Summer | 10 to 30 ft | dawn & dusk | Deep basin (38 ft) | Small spoon fished deep, Trolled lake-clear wobbler + worm |
| Fall | 2 to 15 ft | midday & dawn | open water | Small spoon (orange), Spinner |
| Winter | 3 to 20 ft | dawn | Shoreline break (1 ft) | Small jigging spoon, Tungsten jig + plastic |
Mug Lake carries 4 mapped structure features, topping out (or rather bottoming out) at Deep basin, about 38 ft down.
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 Mug Lake specifically, so confirm the current rules before you fish.
Check the official Ontario fishing regulations →
Mug Lake is about 49 ft (15 m) deep at its deepest point. The depth data here comes from the Ontario MNRF survey of 1968, a decades-old survey (an MNRF lake survey).
Anglers target brook trout on Mug Lake.
Back-bay flat is the top-rated area: a weed flat in about 2 ft of water that rates good for brook trout in spring. Open the map above to see every rated spot for each 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 Mug 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.
Susy Lake 1 mi · Pole Lake 1 mi · Jimmie Lake 1 mi · Serene Lake 1 mi · Quarry L. 1 mi · McConnell Lake 2 mi · Little McConnell L. 2 mi · Reynolds Lake 2 mi · Secord Lake 2 mi · Boland Lake 3 mi · Shanty Lake 3 mi · Sucker Lake 3 mi
See how Mug 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.