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359-acre lake in Haliburton County, Ontario. The lake tops out around 140 ft. The depth data here comes from the Ontario MNRF survey of 1971, a decades-old survey (a transect sounding survey). What follows comes from the same scoring engine that paints the spots above.
Johnson Lake maps at 361 acres behind 4.4 miles of shoreline, broken up by an island. A middling shoreline index (1.7) gives it some bays to work without being a maze. About 13% of the surface sits shallower than 15 ft — that's the weed-and-bait zone. Call it 1.2 mi long by 1 mi wide at the broadest reach. It sits in Haliburton County. Its nearest charted neighbour, Kelly Lake, is 1 mi to the south.
Spring lake trout on Johnson Lake hold shallow, usually 10 to 40 ft. By summer they slide out to 50 to 120 ft, and by winter most fish are in 20 to 80 ft. The chart's best answer is Main-lake point — point, 39 ft, prime for spring. Prime time lands in early morning. The summer box starts with a white tube jig (deep) or a magnum spoon on downrigger.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 10 to 40 ft | dawn & dusk | Main-lake point (39 ft) | Casting spoon over shoals, Jerkbait (shallow) |
| Summer | 50 to 120 ft | dawn | Break off the point (120 ft) | White tube jig (deep), Magnum spoon on downrigger |
| Fall | 10 to 50 ft | dusk & dawn | Main-lake point (39 ft) | Heavy casting spoon, Jigging rap over reefs |
| Winter | 20 to 80 ft | dawn | Deep basin (140 ft) | White tube jig, Airplane jig |
Early season smallmouth bass use the shallows, holding in 3 to 12 ft. Summer is a 10 to 30 ft game here, winter a 20 to 45 ft one. The chart's best answer is Secondary point — point, 15 ft, prime for fall. Best bite is early morning and the evening. Tie on a drop shot (goby/minnow) or a ned rig and you're in the game.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 12 ft | dawn & dusk | Secondary point (15 ft) | Ned rig, Tube jig |
| Summer | 10 to 30 ft | dawn & dusk | Secondary point (15 ft) | Drop shot (goby/minnow), Ned rig |
| Fall | 8 to 25 ft | midday & dawn | Secondary point (15 ft) | Jerkbait, Blade bait |
| Winter | 20 to 45 ft | midday | Break off the point (120 ft) | Blade bait, Hair jig |
6 pieces of structure are mapped here — Deep basin, around 140 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 Johnson Lake specifically, so confirm the current rules before you fish.
Check the official Ontario fishing regulations →
Johnson Lake is about 140 ft (43 m) deep at its deepest point. The depth data here comes from the Ontario MNRF survey of 1971, a decades-old survey (a transect sounding survey).
Anglers target lake trout, smallmouth bass on Johnson Lake.
Secondary point is the top-rated area: a point in about 15 ft of water that rates prime for smallmouth bass in fall. Every other rated spot, per species and season, is on the map above.
For lake trout, 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 Johnson 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.
Kelly Lake 1 mi · Snap Lake 1 mi · Goodwin Lake 1 mi · Havelock Lake 2 mi · Little Kennisis Lake 2 mi · Little Buckhorn Lake 2 mi · Wolf Lake 3 mi · Stocking Lake 3 mi · Macdonald Lake 4 mi · Kennisis Lake 4 mi · Slipper Lake 4 mi · One Island Lake 4 mi
See how Johnson Lake stacks up: best smallmouth bass lakes in Ontario · best lake trout lakes in Ontario
More water nearby: Haliburton County fishing maps (295 charts). Browse all Ontario fishing maps or see every water on DepthScout. Bathymetry credit: state fisheries survey programs. 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.