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Rating depth structure for cisco (lake herring).
Shared by DepthScout anglers. Exact spots stay private, always.
320-acre lake in Timiskaming District, Ontario. The lake tops out around 38 ft. The contours come from a model of the real basin shape and its known max depth. Read them as probabilities, not soundings, and keep them out of navigation decisions. The rest of this page walks each species through its year, using the map's own scoring.
Traced from the shoreline, Jamtama Lake runs 320 acres with 3.5 miles of edge. A shoreline index of 1.4 says round and simple: fish relate to depth changes here, not shoreline features. 69% of the surface is littoral (under ~15 ft), per the model — cover, weeds and forage water. End to end it runs roughly 1.2 mi, about 0.7 mi across. The water lies in Timiskaming District. The nearest mapped water is Cooke Lake, 2 mi to the southwest.
Come spring, look for cisco (lake herring) tight to the bank in 10 to 38 ft. Through summer count on 11 to 38 ft; the winter hold is 11 to 38 ft. Start at Deep basin. It's a deep basin holding about 32 ft of water and rates prime come spring. Prime time lands in early morning. A vertical flutter spoon (small) or a drop-shot micro plastic is the honest summer answer here.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 10 to 38 ft | dawn & dusk | Deep basin (32 ft) | Small silver spoon, Tiny swim jig (white) |
| Summer | 11 to 38 ft | dawn | Deep basin (32 ft) | Vertical flutter spoon (small), Drop-shot micro plastic |
| Fall | 5 to 25 ft | dusk & dawn | Break off the point (17 ft) | Small casting spoon, Inline spinner (silver) |
| Winter | 11 to 38 ft | dawn | Deep basin (32 ft) | Small jigging spoon (glow/silver), Tungsten jig + minnow head |
Structure-wise the chart holds 6 features, led in depth by Deep basin at roughly 32 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 Jamtama Lake specifically, so confirm the current rules before you fish.
Check the official Ontario fishing regulations →
Jamtama Lake is about 38 ft (12 m) deep at its deepest point. The contours here are modeled from the water's real shape and maximum depth, so treat them as a rough guide.
Anglers target cisco (lake herring) on Jamtama Lake.
Deep basin is the top-rated area: a deep basin in about 32 ft of water that rates prime for cisco (lake herring) in spring. 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 Jamtama 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.
Cooke Lake 2 mi · Alexander Lake 3 mi · Heart L. 4 mi · Mountain L. 5 mi · Elk Lake 6 mi · Crane Lake 6 mi · Hope Lake 6 mi · McKenzie Lake 7 mi · Nellie L. 7 mi · Tud Lake 7 mi · Philbrick Lake 7 mi · Munroe Lake 7 mi
See how Jamtama Lake stacks up: best cisco (lake herring) lakes in Ontario
More water nearby: Timiskaming District fishing maps (515 charts). Browse all Ontario fishing maps or see every water on DepthScout. 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.