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Rating depth structure for rainbow trout.
Recent public catches load as you reach this section.
723-acre lake in Bulkley-Nechako Regional District, British Columbia. The lake tops out around 43 ft. What you see is a modeled chart: the shoreline is real, the max depth is published, and the contours between are estimated. Plan with it; don't navigate by it. Every species below gets its seasonal read from the same numbers driving the chart.
Traced from the shoreline, Cow Lake runs 723 acres with 7.4 miles of edge. The shoreline is moderately structured (index 2) — enough points and pockets to pattern. About 38% of the surface sits shallower than 15 ft on the modeled chart — that's the weed-and-bait zone. Call it 2.9 mi long by 0.9 mi wide at the broadest reach. You'll find it in Bulkley-Nechako Regional District. For a second option, Johnny Lake lies 4 mi southeast.
Spring puts rainbow trout in skinny water — 5 to 20 ft is the zone. As the season builds they drop to 8 to 30 ft, wintering in 8 to 40 ft. Winter rainbow trout concentrate at Break off the point, a prime-rated drop-off around 19 ft. Warm-month bites cluster around early morning and the evening. A dodger + spoon (deep troll) or a flutter spoon covers the summer program.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 5 to 20 ft | dawn & dusk | Main-lake point (11 ft) | Inline spinner (silver), Small spoon |
| Summer | 8 to 30 ft | dawn & dusk | Break off the point (19 ft) | Dodger + spoon (deep troll), Flutter spoon |
| Fall | 10 to 35 ft | dawn & dusk | Main-lake point (11 ft) | Casting spoon, Jerkbait over shoals |
| Winter | 8 to 40 ft | dawn | Break off the point (19 ft) | Jigging spoon, Tube jig (white) |
Early season lake whitefish use the shallows, holding in 13 to 43 ft. Even in summer they hold at 13 to 43 ft; winter keeps them in 13 to 43 ft. The chart's best answer is Deep basin — deep basin, 37 ft, prime for summer. Best bite is early morning. Tie on a blade bait vertical or a small jigging spoon and you're in the game.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 13 to 43 ft | midday & dawn | Break off the point (19 ft) | Small jig + waxworm, Blade bait (small) |
| Summer | 13 to 43 ft | dawn | Deep basin (37 ft) | Blade bait vertical, Small jigging spoon |
| Fall | 8 to 30 ft | dusk | Break off the point (19 ft) | Small spoon (gold), Jig + plastic larva |
| Winter | 13 to 43 ft | midday & dawn | Deep basin (37 ft) | Jigging spoon + bead chain, Tungsten jig + waxie |
Count 6 structure marks on this chart. The deepest, Deep basin, sits near 37 ft.
Season dates, license requirements, and size and bag limits for British Columbia waters are set by the BC freshwater fishing synopsis — and special regulations can apply to Cow Lake specifically, so confirm the current rules before you fish.
Check the official British Columbia fishing regulations →
Cow Lake is about 43 ft (13 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 rainbow trout, lake whitefish on Cow Lake.
Deep basin is the top-rated area: a deep basin in about 37 ft of water that rates prime for lake whitefish in summer. The map above holds the full rated-spot list for every species and season.
For rainbow 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 Cow Lake is regulated by the BC freshwater fishing synopsis. Check the official British Columbia regulations for current license requirements, season dates, and size and bag limits — special regulations can apply to this specific water.
Johnny Lake 4 mi · Entiako Lake 5 mi · Tschick Lake 7 mi · Moose Lake 8 mi · Williamson Lake 11 mi · Laidman Lake 12 mi · Capoose Lake 12 mi · Basalt Lake 14 mi · Majuba Lake 14 mi · Tsayakwacha Lake 14 mi · Eliguk Lake 15 mi · Tetachuck Lake 16 mi
See how Cow Lake stacks up: best rainbow trout lakes in British Columbia · best lake whitefish lakes in British Columbia
More water nearby: Bulkley-Nechako Regional District fishing maps (324 charts). Browse all British Columbia 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.