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31-acre lake in British Columbia. The lake tops out around 71 ft. Depth here is modeled from the true shoreline and max depth rather than surveyed; use it to plan, not to navigate. Species by species, here's what the data says the year looks like.
Thomson Lake maps at 31 acres behind 1 miles of shoreline. The basin is a simple one (shoreline index 1.2) — close to a bowl, so the structure on the chart matters more than the bank. Roughly 20% of the water is 15 ft or less as modeled, the band where the food chain lives. The basin spans about 0.3 mi end to end and 0.2 mi across at its widest. It sits in Cariboo Regional District. Its nearest charted neighbour, Bobbs Lake, is 2 mi to the south.
When the water first warms, rainbow trout slide up into 5 to 20 ft. By summer they slide out to 8 to 30 ft, and by winter most fish are in 8 to 40 ft. If you only fish one area, make it Break off the point: a drop-off around 32 ft that scores prime in winter. In summer the feeding windows fall in early morning and the evening. Keep a dodger + spoon (deep troll) or a flutter spoon rigged through the warm months.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 5 to 20 ft | dawn & dusk | Main-lake point (18 ft) | Inline spinner (silver), Small spoon |
| Summer | 8 to 30 ft | dawn & dusk | Break off the point (32 ft) | Dodger + spoon (deep troll), Flutter spoon |
| Fall | 10 to 35 ft | dawn & dusk | Main-lake point (18 ft) | Casting spoon, Jerkbait over shoals |
| Winter | 8 to 40 ft | dawn | Break off the point (32 ft) | Jigging spoon, Tube jig (white) |
Come spring, look for kokanee tight to the bank in 10 to 30 ft. Expect a summer slide to 30 to 70 ft, then a winter hold in 18 to 71 ft. Start at Deep basin. It's a deep basin holding about 60 ft of water and rates prime come summer. Prime time lands in early morning. A dodger + pink/orange squid on downrigger or a kokanee bug + corn is the honest summer answer here.
Depth note: when a documented seasonal range extends below this chart, the table shows the deepest mapped working water, not a verified holding depth.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 10 to 30 ft | dawn | Break off the point (32 ft) | Small dodger + squid (pink), Wedding-ring spinner + corn |
| Summer | 30 to 70 ft | dawn | Deep basin (60 ft) | Dodger + pink/orange squid on downrigger, Kokanee bug + corn |
| Fall | 5 to 40 ft | dawn | Break off the point (32 ft) | Dodger + squid (deeper red/purple), Small spoon |
| Winter | 18 to 71 ft chart-limited; documented 20 to 80 ft | dawn | Deep basin (60 ft) | Small glow jig + corn or maggot, Tiny spoon |
In spring, lake whitefish run shallow here, mostly 15 to 45 ft. Summer pushes them deeper, 21 to 71 ft, and winter fish settle into 25 to 70 ft. Deep basin is the standout, a deep basin at roughly 60 ft, rated prime for summer lake whitefish. Time it for early morning. You won't need more than a blade bait vertical or a small jigging spoon most summer days.
Depth note: when a documented seasonal range extends below this chart, the table shows the deepest mapped working water, not a verified holding depth.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 15 to 45 ft | midday & dawn | Break off the point (32 ft) | Small jig + waxworm, Blade bait (small) |
| Summer | 21 to 71 ft chart-limited; documented 40 to 90 ft | dawn | Deep basin (60 ft) | Blade bait vertical, Small jigging spoon |
| Fall | 8 to 30 ft | dusk | Main-lake point (18 ft) | Small spoon (gold), Jig + plastic larva |
| Winter | 25 to 70 ft | midday & dawn | Deep basin (60 ft) | Jigging spoon + bead chain, Tungsten jig + waxie |
Spring burbot on Thomson Lake hold shallow, usually 25 to 70 ft. By summer they slide out to 21 to 71 ft, and by winter most fish are in 15 to 60 ft. The chart's best answer is Deep basin — deep basin, 60 ft, prime for spring. Prime time lands in after dark and midday. The summer box starts with a heavy jig + cut bait.
Depth note: when a documented seasonal range extends below this chart, the table shows the deepest mapped working water, not a verified holding depth.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 25 to 70 ft | night & dusk | Deep basin (60 ft) | Glow jigging spoon + cut bait, Rattle bait (dark) |
| Summer | 21 to 71 ft chart-limited; documented 50 to 120 ft | night & midday | Deep basin (60 ft) | Heavy jig + cut bait |
| Fall | 21 to 71 ft chart-limited; documented 30 to 80 ft | night & dusk | Deep basin (60 ft) | Glow spoon + minnow head, Blade bait (slow) |
| Winter | 15 to 60 ft | night & dusk | Deep basin (60 ft) | Glow tungsten + cut bait, Rattle spoon + minnow head |
Count 4 structure marks on this chart. The deepest, Deep basin, sits near 60 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 Thomson Lake specifically, so confirm the current rules before you fish.
Check the official British Columbia fishing regulations →
Thomson Lake is about 71 ft (22 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, kokanee, lake whitefish, burbot on Thomson Lake. This isn't a survey of the water — none is published for it — but an informed estimate from the species common to the region, narrowed by this water's depth, size and each species' range.
Deep basin is the top-rated area: a deep basin in about 60 ft of water that rates prime for kokanee in summer. The interactive chart above rates every 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 Thomson 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.
Bobbs Lake 2 mi · Hawkins Lake 2 mi · Greenlee Lake 4 mi · Ruth Lake 4 mi · Roger Lake 5 mi · Chris Lake 6 mi · Chicken Lake 7 mi · Judy Lake 7 mi · Wilcox Lake 7 mi · Susan Lake 8 mi · Howard Lake 8 mi · Succour Lake 8 mi
See how Thomson Lake stacks up: best rainbow trout lakes in British Columbia · best kokanee lakes in British Columbia · best lake whitefish lakes in British Columbia · best burbot lakes in British Columbia
More water nearby: Cariboo Regional District fishing maps (445 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.