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Rating depth structure for rainbow trout.
Recent public catches load as you reach this section.
193-acre lake in Peace River Regional District, British Columbia. The lake tops out around 82 ft. These contours are modeled — built from the real shoreline and the water's maximum depth — so read them as a guide, never as navigation. Here is how the season plays out for each species, straight from the data behind the map.
Drawn out, this is 193 acres of water rimmed by 2.6 miles of bank. Nearly circular (index 1.3), so the story is the bottom, not the bank. 8% of the surface is littoral (under ~15 ft), per the model — cover, weeds and forage water. Tip to tip the water measures near 1 mi with a 0.4-mi widest point. The water lies in Peace River Regional District. The nearest mapped water is Fellers Lake, 5 mi to the southeast.
The spring pattern is a shallow one: rainbow trout in 5 to 20 ft. Midsummer fish sit out in 8 to 30 ft before dropping to 8 to 40 ft for winter. The spot to know is Break off the point, a drop-off in about 37 ft of water that rates prime for rainbow trout in winter. Plan around early morning and the evening in the warm months. Summer baits: a dodger + spoon (deep troll) or a flutter spoon gets it done.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 5 to 20 ft | dawn & dusk | Main-lake point (21 ft) | Inline spinner (silver), Small spoon |
| Summer | 8 to 30 ft | dawn & dusk | Main-lake point (21 ft) | Dodger + spoon (deep troll), Flutter spoon |
| Fall | 10 to 35 ft | dawn & dusk | Main-lake point (21 ft) | Casting spoon, Jerkbait over shoals |
| Winter | 8 to 40 ft | dawn | Break off the point (37 ft) | Jigging spoon, Tube jig (white) |
Count 6 structure marks on this chart. The deepest, Deep basin, sits near 70 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 Onion Lake specifically, so confirm the current rules before you fish.
Check the official British Columbia fishing regulations →
Onion Lake is about 82 ft (25 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 on Onion Lake.
Break off the point is the top-rated area: a drop-off in about 37 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 Onion 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.
Fellers Lake 5 mi · Wapiti Lake 5 mi · Lower Blue Lake 12 mi · Hambler Lakes 12 mi · Quintette Lake 12 mi · Hambler Lakes 13 mi · Upper Blue Lake 14 mi · Paxton Lake 15 mi · Stony Lake 15 mi · Monkman Lake 16 mi · Serpent Lake 17 mi · Lake Joan 17 mi
See how Onion Lake stacks up: best rainbow trout lakes in British Columbia
More water nearby: Peace River Regional District fishing maps (100 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.