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Rating depth structure for smallmouth bass.
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15,331-acre lake in Cowichan Valley Regional District, British Columbia. The lake tops out around 499 ft. Contours on this water are modeled from its actual shoreline and max depth. Good for finding likely water, never for navigation. Here is how the season plays out for each species, straight from the data behind the map.
Cowichan Lake maps at 15,372 acres behind 61.6 miles of shoreline, broken up by an island. An index of 3.5 puts the bank firmly in maze territory: point after pocket after cove, every one a casting target. The shallow band under 15 ft claims about 4% of the surface on the model — that's where the groceries are. Tip to tip the water measures near 19.3 mi with a 3.3-mi widest point. It sits in Cowichan Valley Regional District. If the bite dies, Sherk Lake is 5 mi to the northeast.
Spring brook trout on Cowichan Lake hold shallow, usually 2 to 15 ft. By summer they slide out to 10 to 30 ft, and by winter most fish are in 3 to 20 ft. The chart's best answer is Creek inflow — inflow / creek mouth, 8 ft, prime for spring. Prime time lands in early morning and the evening. The summer box starts with a small spoon fished deep or a trolled lake-clear wobbler + worm.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 15 ft | dawn & dusk | Creek inflow (8 ft) | Small inline spinner (gold), Tiny spoon |
| Summer | 10 to 30 ft | dawn & dusk | Creek inflow (8 ft) | Small spoon fished deep, Trolled lake-clear wobbler + worm |
| Fall | 2 to 15 ft | midday & dawn | Creek inflow (8 ft) | Small spoon (orange), Spinner |
| Winter | 3 to 20 ft | dawn | Creek inflow (8 ft) | Small jigging spoon, Tungsten jig + plastic |
When the water first warms, brown bullhead slide up into 2 to 8 ft. By summer they slide out to 3 to 12 ft, and by winter most fish are in 10 to 25 ft. If you only fish one area, make it Creek inflow: an inflow / creek mouth around 8 ft that scores prime in spring. In summer the feeding windows fall in after dark and the evening.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 8 ft | dusk & night | Creek inflow (8 ft) | |
| Summer | 3 to 12 ft | night & dusk | Shallow bay flat (6 ft) | |
| Fall | 5 to 15 ft | dusk | Shallow bay flat (6 ft) | |
| Winter | 10 to 25 ft | midday | Deep basin (424 ft) |
Spring puts brown trout in skinny water — 3 to 25 ft is the zone. Warm water sends them out to 25 to 60 ft; cold water stacks them in 5 to 35 ft. Creek inflow is the standout, an inflow / creek mouth at roughly 8 ft, rated prime for spring brown trout. Plan around after dark and early morning in the warm months. A spoon at the thermocline or a deep stickbait (night) covers the summer program.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 25 ft | dawn & dusk | Creek inflow (8 ft) | Stickbait off planer boards (shallow), Small spoon along mud lines |
| Summer | 25 to 60 ft | night & dawn | Offshore hump (40 ft) | Spoon at the thermocline, Deep stickbait (night) |
| Fall | 5 to 30 ft | dusk & dawn | Creek inflow (8 ft) | Jerkbait over gravel, Casting spoon |
| Winter | 5 to 35 ft | dawn | Creek inflow (8 ft) | Jigging spoon, Small stickbait (slow) |
Spring puts cutthroat trout in skinny water — 3 to 15 ft is the zone. Warm water sends them out to 10 to 35 ft; cold water stacks them in 10 to 40 ft. Creek inflow is the standout, an inflow / creek mouth at roughly 8 ft, rated prime for spring cutthroat trout. Plan around early morning and the evening in the warm months. A trolled spoon (small) or an inline spinner covers the summer program.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 15 ft | dawn & dusk | Creek inflow (8 ft) | Inline spinner (silver/gold), Small spoon |
| Summer | 10 to 35 ft | dawn & dusk | Sharp break (18 ft) | Trolled spoon (small), Inline spinner |
| Fall | 5 to 25 ft | dawn & dusk | Shoreline point (19 ft) | Casting spoon, Inline spinner |
| Winter | 10 to 40 ft | dawn | Sharp break (18 ft) | Small jigging spoon, Marabou jig |
Spring kokanee on Cowichan Lake hold shallow, usually 10 to 30 ft. By summer they slide out to 30 to 70 ft, and by winter most fish are in 20 to 80 ft. The chart's best answer is Creek inflow — inflow / creek mouth, 8 ft, prime for fall. Prime time lands in early morning. The summer box starts with a dodger + pink/orange squid on downrigger or a kokanee bug + corn.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 10 to 30 ft | dawn | Sharp break (18 ft) | Small dodger + squid (pink), Wedding-ring spinner + corn |
| Summer | 30 to 70 ft | dawn | Offshore hump (40 ft) | Dodger + pink/orange squid on downrigger, Kokanee bug + corn |
| Fall | 5 to 40 ft | dawn | Creek inflow (8 ft) | Dodger + squid (deeper red/purple), Small spoon |
| Winter | 20 to 80 ft | dawn | Offshore hump (40 ft) | Small glow jig + corn or maggot, Tiny spoon |
Come spring, look for smallmouth bass tight to the bank in 3 to 12 ft. They move out to 10 to 30 ft in summer and finish the year down in 20 to 45 ft. If you only fish one area, make it Shoreline point: a point around 19 ft that scores prime in fall. Best bite is early morning and the evening. A drop shot (goby/minnow) or a ned rig is the honest summer answer here.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 12 ft | dawn & dusk | Creek inflow (8 ft) | Ned rig, Tube jig |
| Summer | 10 to 30 ft | dawn & dusk | Sharp break (18 ft) | Drop shot (goby/minnow), Ned rig |
| Fall | 8 to 25 ft | midday & dawn | Shoreline point (19 ft) | Jerkbait, Blade bait |
| Winter | 20 to 45 ft | midday | Sharp break (18 ft) | Blade bait, Hair jig |
Cowichan Lake also holds rainbow trout (8 to 30 ft in summer). Pick any of them on the map above for rated spots and bait picks.
The chart marks 24 structure features on Cowichan Lake; the deepest is Deep basin at about 424 ft.
Access data: British Columbia Recreation Sites and Trails - Recreation Sites Subset. Confirm conditions and fees locally before you launch.
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 Cowichan Lake specifically, so confirm the current rules before you fish.
Check the official British Columbia fishing regulations →
Cowichan Lake is about 499 ft (152 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 brook trout, brown bullhead, brown trout, cutthroat trout, kokanee, smallmouth bass, rainbow trout on Cowichan Lake.
Creek inflow is the top-rated area: an inflow / creek mouth in about 8 ft of water that rates prime for brook trout in spring. Scroll up to the map for the complete spot list by species and season.
For brook 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 Cowichan 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.
Sherk Lake 5 mi · Mesachie Lake 8 mi · Beaver Lake 9 mi · Rheinhart Lake 10 mi · Kwassin Lake 11 mi · Kissinger Lake 11 mi · Grant Lake 11 mi · Doe Lake 14 mi · Dimple Lake 14 mi · Mayo Lake 15 mi · Tuck Lake 15 mi · Fourth Lake 15 mi
See how Cowichan Lake stacks up: best smallmouth bass lakes in British Columbia · best rainbow trout lakes in British Columbia · best brown trout lakes in British Columbia · best brook trout lakes in British Columbia
More water nearby: Cowichan Valley Regional District fishing maps (30 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.