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Rating depth structure for rainbow trout.
Recent public catches load as you reach this section.
766-acre lake in Peace River Regional District, British Columbia. The lake tops out around 112 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. Here's the year, species by species, as the scoring engine sees it.
Traced from the shoreline, Trimble Lake runs 766 acres with 7.6 miles of edge. Index 2 on the shoreline: a few honest points and pockets, nothing labyrinthine. The shallow band under 15 ft claims about 12% of the surface on the model — that's where the groceries are. End to end it runs roughly 3.2 mi, about 0.7 mi across. The water lies in Peace River Regional District. The nearest mapped water is Fairy Lake, 12 mi to the west.
Start shallow in spring: arctic grayling sit in 2 to 10 ft that time of year. Warm water sends them out to 3 to 15 ft; cold water stacks them in 8 to 25 ft. Top water on the chart: Shallow bay flat, a feeding flat in the 6 ft range, prime in summer. Fish it in the evening and early morning and you'll meet the bite. Throw a dry fly (parachute adams, elk hair caddis) or a small inline spinner until the fish tell you otherwise.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 10 ft | midday & dusk | Shallow bay flat (6 ft) | 1/16 oz spinner (silver), Small dry fly (Adams, Griffith's) |
| Summer | 3 to 15 ft | dusk & dawn | Shallow bay flat (6 ft) | Dry fly (parachute Adams, elk hair caddis), Small inline spinner |
| Fall | 6 to 20 ft | midday | Break off the point (50 ft) | Small spoon, Beadhead nymph under indicator |
| Winter | 8 to 25 ft | midday & dawn | Shallow bay flat (6 ft) | Tungsten jig + waxworm, Small jigging spoon (gold) |
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 Main-lake point, a point in about 28 ft of water that rates prime for rainbow trout in fall. 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 | Shallow bay flat (6 ft) | Inline spinner (silver), Small spoon |
| Summer | 8 to 30 ft | dawn & dusk | Main-lake point (28 ft) | Dodger + spoon (deep troll), Flutter spoon |
| Fall | 10 to 35 ft | dawn & dusk | Main-lake point (28 ft) | Casting spoon, Jerkbait over shoals |
| Winter | 8 to 40 ft | dawn | Break off the point (50 ft) | Jigging spoon, Tube jig (white) |
When the water first warms, lake whitefish slide up into 15 to 45 ft. By summer they slide out to 40 to 90 ft, and by winter most fish are in 25 to 70 ft. If you only fish one area, make it Deep basin: a deep basin around 95 ft that scores prime in summer. In summer the feeding windows fall in early morning. Keep a blade bait vertical or a small jigging spoon rigged through the warm months.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 15 to 45 ft | midday & dawn | Break off the point (50 ft) | Small jig + waxworm, Blade bait (small) |
| Summer | 40 to 90 ft | dawn | Deep basin (95 ft) | Blade bait vertical, Small jigging spoon |
| Fall | 8 to 30 ft | dusk | Main-lake point (28 ft) | Small spoon (gold), Jig + plastic larva |
| Winter | 25 to 70 ft | midday & dawn | Break off the point (50 ft) | Jigging spoon + bead chain, Tungsten jig + waxie |
The chart marks 6 structure features on Trimble Lake; the deepest is Deep basin at about 95 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 Trimble Lake specifically, so confirm the current rules before you fish.
Check the official British Columbia fishing regulations →
Trimble Lake is about 112 ft (34 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 arctic grayling, rainbow trout, lake whitefish on Trimble Lake.
Deep basin is the top-rated area: a deep basin in about 95 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 arctic grayling, the summer bite is best in the evening and 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 Trimble 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.
Fairy Lake 12 mi · Redfern Lake 12 mi · Marion Lake 20 mi · Lifeline Lake 30 mi · Kluachesi Lake 51 mi · Fern Lake 56 mi · Lafferty Lake 59 mi · Ed Bird Lake 59 mi · Chesterfield Lake 63 mi · Emerslund Lakes 64 mi · Emerslund Lakes 64 mi · Haworth Lake 67 mi
See how Trimble Lake stacks up: best rainbow trout lakes in British Columbia · best lake whitefish lakes in British Columbia · best arctic grayling 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.