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Rating depth structure for rainbow trout.
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205-acre lake in Kitimat-Stikine Regional District, British Columbia. The lake tops out around 112 ft. The chart is a model: real shoreline, published maximum depth, interpolated in between. A planning tool, never a navigation product. What follows comes from the same scoring engine that paints the spots above.
Traced from the shoreline, Treston Lake runs 205 acres with 2.6 miles of edge. A shoreline index of 1.3 says round and simple: fish relate to depth changes here, not shoreline features. 46% of the surface is littoral (under ~15 ft), per the model — cover, weeds and forage water. The basin spans about 0.9 mi end to end and 0.6 mi across at its widest. You'll find it in Kitimat-Stikine Regional District. The nearest mapped water is Redsand Lake, 1 mi to the north.
When the water first warms, cutthroat trout slide up into 3 to 15 ft. By summer they slide out to 10 to 35 ft, and by winter most fish are in 10 to 40 ft. If you only fish one area, make it Main-lake point: a point around 28 ft that scores prime in summer. In summer the feeding windows fall in early morning and the evening. Keep a trolled spoon (small) or an inline spinner rigged through the warm months.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 15 ft | dawn & dusk | open water | Inline spinner (silver/gold), Small spoon |
| Summer | 10 to 35 ft | dawn & dusk | Main-lake point (28 ft) | Trolled spoon (small), Inline spinner |
| Fall | 5 to 25 ft | dawn & dusk | Main-lake point (28 ft) | Casting spoon, Inline spinner |
| Winter | 10 to 40 ft | dawn | Main-lake point (28 ft) | Small jigging spoon, Marabou jig |
In spring, rainbow trout run shallow here, mostly 5 to 20 ft. Summer pushes them deeper, 8 to 30 ft, and winter fish settle into 8 to 40 ft. Main-lake point is the standout, a point at roughly 28 ft, rated prime for fall rainbow trout. Time it for early morning and the evening. You won't need more than a dodger + spoon (deep troll) or a flutter spoon most summer days.
| 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) |
Spring lake whitefish on Treston Lake hold shallow, usually 15 to 45 ft. They move out to 40 to 90 ft in summer and finish the year down in 25 to 70 ft. Put Deep basin first on the milk run — a deep basin near 95 ft that grades prime for summer. The feeding windows run early morning. The summer box starts with a blade bait vertical or a small jigging spoon.
| 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 |
Structure-wise the chart holds 6 features, led in depth by Deep basin at roughly 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 Treston Lake specifically, so confirm the current rules before you fish.
Check the official British Columbia fishing regulations →
Treston 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 cutthroat trout, rainbow trout, lake whitefish on Treston 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. Open the map above to see every rated spot for each species and season.
For cutthroat 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 Treston 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.
Redsand Lake 1 mi · Kitsumkalum Lake 6 mi · Pine Lake 6 mi · Sand Lake 20 mi · Herman Lake 21 mi · Gainor Lake 21 mi · Lakelse Lake 23 mi · Lava Lake 26 mi · Onion Lake 28 mi · Kleanza Lake 30 mi · Arden Lake 44 mi · Alastair Lake 44 mi
See how Treston Lake stacks up: best rainbow trout lakes in British Columbia · best lake whitefish lakes in British Columbia · best cutthroat trout lakes in British Columbia
More water nearby: Kitimat-Stikine Regional District fishing maps (97 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.