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Rating depth structure for rainbow trout.
Recent public catches load as you reach this section.
66-acre lake in Central Kootenay Regional District, British Columbia. The lake tops out around 41 ft. Bathymetry on this water is estimated from its real outline and maximum depth. Use it to shortlist water, then verify with your electronics — and never navigate by it. The rest of this page walks each species through its year, using the map's own scoring.
The drawn water covers 66 acres wrapped in 1.4 miles of bank. At index 1.2 the outline is almost a bowl — read the depth changes, not the shoreline. Roughly 55% of the water is 15 ft or less as modeled, the band where the food chain lives. Figure 0.6 mi of water from one end to the other, 0.3 mi at the beam. Central Kootenay Regional District claims this one. Its nearest charted neighbour, Rosebud Lake, is 17 mi to the west.
When the water first warms, brook trout slide up into 2 to 15 ft. Summer is a 10 to 30 ft game here, winter a 3 to 20 ft one. Start at Break off the point. It's a drop-off holding about 18 ft of water and rates prime come summer. The feeding windows run early morning and the evening. Keep a small spoon fished deep or a trolled lake-clear wobbler + worm rigged through the warm months.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 15 ft | dawn & dusk | Main-lake point (10 ft) | Small inline spinner (gold), Tiny spoon |
| Summer | 10 to 30 ft | dawn & dusk | Break off the point (18 ft) | Small spoon fished deep, Trolled lake-clear wobbler + worm |
| Fall | 2 to 15 ft | midday & dawn | Main-lake point (10 ft) | Small spoon (orange), Spinner |
| Winter | 3 to 20 ft | dawn | Break off the point (18 ft) | Small jigging spoon, Tungsten jig + plastic |
Start shallow in spring: cutthroat trout sit in 3 to 15 ft that time of year. Summer pushes them deeper, 10 to 35 ft, and winter fish settle into 10 to 40 ft. The spot to know is Break off the point, a drop-off in about 18 ft of water that rates prime for cutthroat trout in summer. Warm-month bites cluster around early morning and the evening. Throw a trolled spoon (small) or an inline spinner until the fish tell you otherwise.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 15 ft | dawn & dusk | Main-lake point (10 ft) | Inline spinner (silver/gold), Small spoon |
| Summer | 10 to 35 ft | dawn & dusk | Break off the point (18 ft) | Trolled spoon (small), Inline spinner |
| Fall | 5 to 25 ft | dawn & dusk | Main-lake point (10 ft) | Casting spoon, Inline spinner |
| Winter | 10 to 40 ft | dawn | Break off the point (18 ft) | Small jigging spoon, Marabou jig |
When the water first warms, kokanee slide up into 10 to 30 ft. Summer is a 12 to 41 ft game here, winter a 10 to 41 ft one. Start at Deep basin. It's a deep basin holding about 35 ft of water and rates prime come summer. The feeding windows run early morning. Keep a dodger + pink/orange squid on downrigger or a kokanee bug + corn rigged through the warm months.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 10 to 30 ft | dawn | Deep basin (35 ft) | Small dodger + squid (pink), Wedding-ring spinner + corn |
| Summer | 12 to 41 ft | dawn | Deep basin (35 ft) | Dodger + pink/orange squid on downrigger, Kokanee bug + corn |
| Fall | 5 to 40 ft | dawn | Deep basin (35 ft) | Dodger + squid (deeper red/purple), Small spoon |
| Winter | 10 to 41 ft | dawn | Deep basin (35 ft) | Small glow jig + corn or maggot, Tiny spoon |
Come spring, look for rainbow trout tight to the bank in 5 to 20 ft. They move out to 8 to 30 ft in summer and finish the year down in 8 to 40 ft. If you only fish one area, make it Break off the point: a drop-off around 18 ft that scores prime in winter. Best bite is early morning and the evening. A dodger + spoon (deep troll) or a flutter spoon is the honest summer answer here.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 5 to 20 ft | dawn & dusk | Main-lake point (10 ft) | Inline spinner (silver), Small spoon |
| Summer | 8 to 30 ft | dawn & dusk | Break off the point (18 ft) | Dodger + spoon (deep troll), Flutter spoon |
| Fall | 10 to 35 ft | dawn & dusk | Main-lake point (10 ft) | Casting spoon, Jerkbait over shoals |
| Winter | 8 to 40 ft | dawn | Break off the point (18 ft) | Jigging spoon, Tube jig (white) |
Count 6 structure marks on this chart. The deepest, Deep basin, sits near 35 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 Boundary Lake specifically, so confirm the current rules before you fish.
Check the official British Columbia fishing regulations →
Boundary Lake is about 41 ft (12 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, cutthroat trout, kokanee, rainbow trout on Boundary Lake.
Break off the point is the top-rated area: a drop-off in about 18 ft of water that rates prime for cutthroat trout in summer. The map above holds the full rated-spot list for every 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 Boundary 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.
Rosebud Lake 17 mi · Lomond Lake 19 mi · Mill Pond 21 mi, WA · Sullivan Lake 22 mi, WA · Erie Lake 24 mi · Priest Lake 28 mi, ID · Cedar Lake 32 mi, WA · Cottonwood Lake 33 mi · Deep Lake 34 mi, WA · Champion Lakes 35 mi · Kearns Lake 35 mi · Champion Lakes 36 mi
See how Boundary Lake stacks up: best rainbow trout lakes in British Columbia · best brook trout lakes in British Columbia · best kokanee lakes in British Columbia · best cutthroat trout lakes in British Columbia
More water nearby: Central Kootenay Regional District fishing maps (47 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.