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Rating depth structure for rainbow trout.
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351-acre lake in British Columbia. The lake tops out around 13 ft. The depth chart comes from British Columbia Fish and Wildlife Branch bathymetric survey data, so the contours are survey-derived rather than computer-modeled. Here's the year, species by species, as the scoring engine sees it.
Traced from the shoreline, Williamson Lake runs 350 acres with 5.5 miles of edge. Index 2.1 on the shoreline: a few honest points and pockets, nothing labyrinthine. There is no deep basin to speak of — the entire surface is under ~15 ft, prime weed water end to end. Tip to tip the water measures near 1.8 mi with a 0.7-mi widest point. You'll find it in Bulkley-Nechako Regional District. Closest neighbour on DepthScout: Laidman Lake, 3 mi northeast of here.
The spring pattern is a shallow one: rainbow trout in 3 to 13 ft. The depth story barely changes: 3 to 13 ft through summer, 3 to 13 ft in winter. Top water on the chart: Deep basin, a deep basin in the 13 ft range, prime in winter. Time it for early morning and the evening. Summer baits: a dodger + spoon (deep troll) or a flutter spoon gets it done.
Depth note: when a documented seasonal range extends below this chart, the table shows the deepest mapped working water, not a verified holding depth.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 13 ft chart-limited; documented 5 to 20 ft | dawn & dusk | Main-lake point (1 ft) | Inline spinner (silver), Small spoon |
| Summer | 3 to 13 ft chart-limited; documented 8 to 30 ft | dawn & dusk | Deep basin (13 ft) | Dodger + spoon (deep troll), Flutter spoon |
| Fall | 4 to 13 ft chart-limited; documented 10 to 35 ft | dawn & dusk | Deep basin (13 ft) | Casting spoon, Jerkbait over shoals |
| Winter | 3 to 13 ft chart-limited; documented 8 to 40 ft | dawn | Deep basin (13 ft) | Jigging spoon, Tube jig (white) |
Williamson Lake carries 6 mapped structure features, topping out (or rather bottoming out) at Deep basin, about 13 ft down.
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 Williamson Lake specifically, so confirm the current rules before you fish.
Check the official British Columbia fishing regulations →
Williamson Lake is about 13 ft (4 m) deep at its deepest point. The depth chart comes from British Columbia Fish and Wildlife Branch bathymetric survey data, so the contours are survey-derived rather than computer-modeled.
Anglers target rainbow trout on Williamson Lake. This isn't a survey of the water — none is published for it — but an informed estimate from the species common to the region, narrowed by this water's depth, size and each species' range.
Deep basin is the top-rated area: a deep basin in about 13 ft of water that rates prime for rainbow trout in winter. Open the map above to see every rated spot for each 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 Williamson 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.
Laidman Lake 3 mi · Moose Lake 5 mi · Johnny Lake 9 mi · Tsilbekuz Lake 10 mi · Cow Lake 11 mi · Cluchuta Lake 12 mi · Tsetzi Lake 12 mi · Blue Lake 13 mi · Top Lake 13 mi · Eliguk Lake 13 mi · Neyasri Lake 14 mi · Basalt Lake 15 mi
See how Williamson Lake stacks up: best rainbow trout lakes in British Columbia
More water nearby: Bulkley-Nechako Regional District fishing maps (324 charts). Browse all British Columbia fishing maps. See every water on DepthScout. Depth data: British Columbia Fish and Wildlife Branch, FISS lake surveys. 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.