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Rating depth structure for lake trout.
Recent public catches load as you reach this section.
292-acre lake in Northern Rockies Regional District, British Columbia. The lake tops out around 92 ft. The depth chart comes from published agency bathymetric survey data, so the contours are survey-derived rather than computer-modeled. Here's the year, species by species, as the scoring engine sees it.
The drawn water covers 292 acres wrapped in 5 miles of bank, broken up by an island. With a 2.1 development index there's bank structure worth casting at, in moderation. Littoral water — the productive band under ~15 ft — makes up 48% of this chart. Tip to tip the water measures near 1.5 mi with a 0.5-mi widest point. Northern Rockies Regional District claims this one. Its nearest charted neighbour, Fishing Lake, is 12 mi to the north.
Early season arctic grayling use the shallows, holding in 2 to 10 ft. Summer is a 3 to 15 ft game here, winter an 8 to 25 ft one. The chart's best answer is Break off the point — drop-off, 16 ft, prime for fall. Best bite is the evening and early morning. Tie on a dry fly (parachute adams, elk hair caddis) or a small inline spinner and you're in the game.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 10 ft | midday & dusk | Shallow bay flat (1 ft) | 1/16 oz spinner (silver), Small dry fly (Adams, Griffith's) |
| Summer | 3 to 15 ft | dusk & dawn | Break off the point (16 ft) | Dry fly (parachute Adams, elk hair caddis), Small inline spinner |
| Fall | 6 to 20 ft | midday | Break off the point (16 ft) | Small spoon, Beadhead nymph under indicator |
| Winter | 8 to 25 ft | midday & dawn | Break off the point (16 ft) | Tungsten jig + waxworm, Small jigging spoon (gold) |
When the water first warms, lake trout slide up into 10 to 40 ft. Summer is a 28 to 92 ft game here, winter a 20 to 80 ft one. Start at Deep basin. It's a deep basin holding about 77 ft of water and rates prime come summer. The feeding windows run early morning. Keep a white tube jig (deep) or a magnum spoon on downrigger rigged through the warm months.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 10 to 40 ft | dawn & dusk | Secondary point (12 ft) | Casting spoon over shoals, Jerkbait (shallow) |
| Summer | 28 to 92 ft | dawn | Deep basin (77 ft) | White tube jig (deep), Magnum spoon on downrigger |
| Fall | 10 to 50 ft | dusk & dawn | Secondary point (12 ft) | Heavy casting spoon, Jigging rap over reefs |
| Winter | 20 to 80 ft | dawn | Deep basin (77 ft) | White tube jig, Airplane jig |
Structure-wise the chart holds 6 features, led in depth by Deep basin at roughly 77 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 Long Mountain Lake specifically, so confirm the current rules before you fish.
Check the official British Columbia fishing regulations →
Long Mountain Lake is about 92 ft (28 m) deep at its deepest point. The depth chart comes from published agency bathymetric survey data, so the contours are survey-derived rather than computer-modeled.
Anglers target arctic grayling, lake trout on Long Mountain Lake.
Deep basin is the top-rated area: a deep basin in about 77 ft of water that rates prime for lake trout in summer. Every other rated spot, per species and season, is on the map above.
For arctic grayling, the summer bite is best in the evening and early morning. Each species page section below lists the seasonal windows, and the map shows a live NOW badge when you're inside one.
Fishing on Long Mountain 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.
Fishing Lake 12 mi · Forcier Lake 18 mi · Horneline Lake 22 mi · Moose Lake 26 mi · Scoop Lake 34 mi · Muncho Lake 37 mi · Birches Lake 40 mi · Twin Island Lake 42 mi · Netson Lake 42 mi · Aeroplane Lake 44 mi · Moodie Lakes 47 mi · Boreal Lake 50 mi
See how Long Mountain Lake stacks up: best lake trout lakes in British Columbia · best arctic grayling lakes in British Columbia
More water nearby: Northern Rockies Regional District fishing maps (14 charts). Browse all British Columbia fishing maps or see every water on DepthScout. Bathymetry: published agency survey data. 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.