Sign inSign up free Sign inSign up free Sign inSign up freeLake depth chart
Today's read
Rating depth structure for rainbow trout.
Recent public catches load as you reach this section.
1,687-acre lake in British Columbia. The lake tops out around 257 ft. The chart is a model: real shoreline, published maximum depth, interpolated in between. A planning tool, never a navigation product. Here's the year, species by species, as the scoring engine sees it.
Drawn out, this is 1,683 acres of water rimmed by 12.9 miles of bank. A development index of 2.2 means a maze of bays and points: far more casting targets than a round bowl of the same size. 6% of the surface is littoral (under ~15 ft), per the model — cover, weeds and forage water. Figure 5.3 mi of water from one end to the other, 1 mi at the beam. You'll find it in Kitimat-Stikine Regional District. Closest neighbour on DepthScout: Khtada Lake, 11 mi west of here.
These fish are listed in an exact-water agency record as forage or ecological context. They are not target-species profiles and do not affect DepthScout's Prime, Good, or Fair spot ratings.
Official exact-water fish record. The listing documents source-recorded presence, not present abundance or guaranteed catchability.
Start shallow in spring: chinook salmon sit in 5 to 40 ft that time of year. Warm water sends them out to 50 to 120 ft; cold water stacks them in 30 to 90 ft. Top water on the chart: Break off the point, a drop-off in the 116 ft range, prime in summer. Fish it in early morning and the evening and you'll meet the bite. Throw a flasher + fly (green/white) or a magnum spoon on downrigger until the fish tell you otherwise.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 5 to 40 ft | dawn & dusk | open water | Trolled spoon (orange/gold), Stickbait off planer boards |
| Summer | 50 to 120 ft | dawn & dusk | Break off the point (116 ft) | Flasher + fly (green/white), Magnum spoon on downrigger |
| Fall | 10 to 50 ft | dawn & dusk | Main-lake point (64 ft) | J-plug (glow), Flasher + fly |
| Winter | 30 to 90 ft | midday | open water | Small spoon on a slow troll, Stickbait deep |
Spring puts coho salmon in skinny water — 3 to 25 ft is the zone. Warm water sends them out to 30 to 70 ft; cold water stacks them in 20 to 60 ft. Plan around early morning and the evening in the warm months. A dodger + fly or a medium spoon above the thermocline covers the summer program.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 25 ft | dawn & dusk | open water | Small orange dodger + peanut fly, Thin spoon (orange/silver) |
| Summer | 30 to 70 ft | dawn & dusk | open water | Dodger + fly, Medium spoon above the thermocline |
| Fall | 8 to 40 ft | dawn & dusk | open water | Casting spoon, Spinner (chartreuse) |
| Winter | 20 to 60 ft | midday | open water | Small spoon, slow troll |
Spring cutthroat trout on Alastair Lake hold shallow, usually 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. Prime time lands in early morning and the evening. The summer box starts with a trolled spoon (small) or an inline spinner.
| 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 | open water | Trolled spoon (small), Inline spinner |
| Fall | 5 to 25 ft | dawn & dusk | open water | Casting spoon, Inline spinner |
| Winter | 10 to 40 ft | dawn | open water | Small jigging spoon, Marabou jig |
Early season steelhead use the shallows, holding in 3 to 20 ft. Expect a summer slide to 5 to 45 ft, then a winter hold in 4 to 15 ft. In summer the feeding windows fall in early morning and the evening. Tie on an orange dodger + fly high in the column or a thin spoon off boards and you're in the game.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 20 ft | dawn & dusk | open water | Small spoon or spinner at the mouths, Jig + waxworm under float |
| Summer | 5 to 45 ft | dawn & dusk | open water | Orange dodger + fly high in the column, Thin spoon off boards |
| Fall | 5 to 30 ft | dawn & dusk | open water | Spinner (silver/blue), Casting spoon |
| Winter | 4 to 15 ft | midday | open water | Float jig (black/purple), Bead rig |
Start shallow in spring: rainbow trout sit in 5 to 20 ft that time of year. Summer pushes them deeper, 8 to 30 ft, and winter fish settle into 8 to 40 ft. The spot to know is Shallow bay flat, a feeding flat in about 6 ft of water that rates good for rainbow trout in spring. Warm-month bites cluster around early morning and the evening. Throw a dodger + spoon (deep troll) or a flutter spoon until the fish tell you otherwise.
| 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 | Shallow bay flat (6 ft) | Dodger + spoon (deep troll), Flutter spoon |
| Fall | 10 to 35 ft | dawn & dusk | open water | Casting spoon, Jerkbait over shoals |
| Winter | 8 to 40 ft | dawn | open water | Jigging spoon, Tube jig (white) |
Come spring, look for lake whitefish tight to the bank in 15 to 45 ft. They move out to 40 to 90 ft in summer and finish the year down in 25 to 70 ft. If you only fish one area, make it Shallow bay flat: a feeding flat around 6 ft that scores good in spring. Best bite is early morning. A blade bait vertical or a small jigging spoon is the honest summer answer here.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 15 to 45 ft | midday & dawn | Shallow bay flat (6 ft) | Small jig + waxworm, Blade bait (small) |
| Summer | 40 to 90 ft | dawn | open water | Blade bait vertical, Small jigging spoon |
| Fall | 8 to 30 ft | dusk | open water | Small spoon (gold), Jig + plastic larva |
| Winter | 25 to 70 ft | midday & dawn | open water | Jigging spoon + bead chain, Tungsten jig + waxie |
Alastair Lake also holds chum salmon (4 to 70 ft in summer), dolly varden (2 to 40 ft in summer), pink salmon (3 to 70 ft in summer), sockeye salmon (3 to 80 ft in summer). Pick any of them on the map above for rated spots and bait picks.
Count 6 structure marks on this chart. The deepest, Deep basin, sits near 218 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 Alastair Lake specifically, so confirm the current rules before you fish.
Check the official British Columbia fishing regulations →
Alastair Lake is about 257 ft (78 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 chinook salmon, coho salmon, cutthroat trout, steelhead, rainbow trout, lake whitefish, chum salmon, dolly varden, pink salmon, sockeye salmon on Alastair Lake.
Break off the point is the top-rated area: a drop-off in about 116 ft of water that rates prime for chinook salmon in summer. The map above holds the full rated-spot list for every species and season.
For chinook salmon, 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 Alastair 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.
Khtada Lake 11 mi · Davis Lake 15 mi · Johnston Lake 20 mi · Jesse Lake 20 mi · Hayward Lake 22 mi · Arden Lake 25 mi · Lower Lake 26 mi · Ecstall Lake 27 mi · Madeline Lake 29 mi · Onion Lake 30 mi · Lakelse Lake 32 mi · Herman Lake 32 mi
See how Alastair Lake stacks up: best rainbow trout lakes in British Columbia · best chinook salmon lakes in British Columbia · best coho salmon lakes in British Columbia · best steelhead lakes in British Columbia
More water nearby: Kitimat-Stikine Regional District fishing maps (97 charts). Browse all British Columbia fishing maps. 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.