Salt water depth chart
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Rating depth structure for pacific chinook salmon.
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149-acre Grace Harbour fishing map with contributor-qualified CHS NONNA survey contours (79.84% measured, 96.77% assessed), four measured spots, regional DFO salmon and herring evidence, boat-and-kayak campsite access, and current Area 15, CSSP and BC Parks guidance. The water tops out around 129 ft. The depth chart comes from CHS bathymetric survey data, so the contours are survey-derived rather than computer-modeled. What the data behind the map says about each species, season by season:
The outline encloses 149 acres, worked by 4.6 miles of shoreline, broken up by 4 islands. The 2.7 development index tells the story — a convoluted bank whose fishable edge far outruns the acreage. About 30% of the surface sits shallower than 15 ft — that's the weed-and-bait zone. The basin spans about 1.2 mi end to end and 0.4 mi across at its widest. If the bite dies, Roscoe Bay is 8 mi to the north.
Come spring, look for pacific chinook salmon tight to the bank in 30 to 120 ft. Expect a summer slide to 17 to 129 ft, then a winter hold in 36 to 129 ft. Start at Grace entrance basin. It's a deep basin holding about 128 ft of water and rates prime come winter. Prime time lands in early morning and the evening. A herring or sand-lance spoon or a baitfish hoochie behind a flasher 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 | 30 to 120 ft | dawn | Grace lower channel shoulder (96 ft) | Herring-pattern spoon, Three-to-four-inch baitfish swimbait |
| Summer | 17 to 129 ft chart-limited; documented 20 to 150 ft | dawn & dusk | Grace lower channel shoulder (96 ft) | Herring or sand-lance spoon, Baitfish hoochie behind a flasher |
| Fall | 10 to 100 ft | dawn & dusk | Grace lower channel shoulder (96 ft) | Compact spoon, Baitfish spinner where legal |
| Winter | 36 to 129 ft chart-limited; documented 50 to 180 ft | midday | Grace entrance basin (128 ft) | Slow-trolled spoon, Deep baitfish plug |
Come spring, look for pacific coho salmon tight to the bank in 10 to 70 ft. They move out to 10 to 100 ft in summer and finish the year down in 30 to 100 ft. If you only fish one area, make it Grace lower channel shoulder: a channel edge around 96 ft that scores prime in summer. Best bite is early morning and the evening. A small hoochie behind a flasher or a slim spoon is the honest summer answer here.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 10 to 70 ft | dawn & dusk | Grace mid-harbour break (80 ft) | Small silver spoon, Slim baitfish fly |
| Summer | 10 to 100 ft | dawn & dusk | Grace lower channel shoulder (96 ft) | Small hoochie behind a flasher, Slim spoon |
| Fall | 5 to 60 ft | dawn & dusk | Surveyed channel edge 2 (20 ft) | Small spinner where legal, Compact spoon |
| Winter | 30 to 100 ft | midday | Grace mid-harbour break (80 ft) | Slow small spoon, Compact trolling fly |
Spring lingcod on Grace Harbour hold shallow, usually 23 to 129 ft. Depth-wise the year is flat: 14 to 129 ft in summer, 32 to 129 ft once it turns cold. The chart's best answer is Grace mid-harbour break — drop-off, 80 ft, prime for spring. Prime time lands in midday and early morning. The summer box starts with a heavy swimbait or a metal jig.
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 | 23 to 129 ft chart-limited; documented 25 to 140 ft | dawn | Grace mid-harbour break (80 ft) | Heavy swimbait, Metal jig |
| Summer | 14 to 129 ft chart-limited; documented 20 to 180 ft | midday & dawn | Grace mid-harbour break (80 ft) | Heavy swimbait, Metal jig |
| Fall | 19 to 129 ft chart-limited; documented 30 to 200 ft | midday | Grace mid-harbour break (80 ft) | Heavy metal jig, Large swimbait |
| Winter | 32 to 129 ft chart-limited; documented 60 to 240 ft | midday | Grace mid-harbour break (80 ft) | Heavy slow-pitch jig |
Spring puts pacific halibut in skinny water — 28 to 129 ft is the zone. Summer fish stay in 14 to 129 ft, and winter fish hold in 32 to 129 ft. Grace upper basin transition is the standout, a feeding flat at roughly 39 ft, rated prime for spring pacific halibut. Plan around midday and early morning in the warm months. A heavy vertical jig or a large swimbait covers the summer program.
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 | 28 to 129 ft chart-limited; documented 35 to 160 ft | dawn | Grace upper basin transition (39 ft) | Heavy glow jig, Large grub on lead head |
| Summer | 14 to 129 ft chart-limited; documented 20 to 180 ft | midday & dawn | Grace upper basin transition (39 ft) | Heavy vertical jig, Large swimbait |
| Fall | 21 to 129 ft chart-limited; documented 35 to 220 ft | midday | Grace lower channel shoulder (96 ft) | Heavy glow jig, Large grub |
| Winter | 32 to 129 ft chart-limited; documented 70 to 280 ft | midday | Grace entrance basin (128 ft) | Heavy slow-pitch jig |
8 pieces of structure are mapped here — Grace entrance basin, around 128 ft, is the deepest of them.
Access data: BC Parks - Desolation Sound Marine Park. 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 DFO Pacific Region recreational-fishing rules — and special regulations can apply to Grace Harbour specifically, so confirm the current rules before you fish.
Check the official British Columbia fishing regulations →
Grace Harbour is about 129 ft (39 m) deep at its deepest point. The depth chart comes from CHS bathymetric survey data, so the contours are survey-derived rather than computer-modeled.
Anglers target pacific chinook salmon, pacific coho salmon, lingcod, pacific halibut on Grace Harbour. The list combines the water's survey records with habitat-filtered species from broader official evidence; those additions are plausible occurrences, not exact-water abundance or guaranteed catches.
Grace entrance basin is the top-rated area: a deep basin in about 128 ft of water that rates prime for pacific chinook salmon in winter. The interactive chart above rates every spot for each species and season.
For pacific 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 Grace Harbour is regulated by the DFO Pacific Region recreational-fishing rules. 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.
Roscoe Bay 8 mi · Black Lake 8 mi · Thompson Lake 9 mi · Gunflint Lake 9 mi · Hague Lake 10 mi · Cassel Lake 11 mi · Sliammon Lake 11 mi · Inland Lake 14 mi · Ellis Lake 14 mi · Baile Lake 15 mi · Cranberry Lake 16 mi · Tom Lake 16 mi
See how Grace Harbour stacks up: best pacific chinook salmon lakes in British Columbia · best pacific coho salmon lakes in British Columbia · best lingcod lakes in British Columbia
Browse all British Columbia fishing maps. See every water on DepthScout. Bathymetry credit: CHS NONNA 10 (CHS Chart Datum (CD); 80% measured, 17% source-interpolated). 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.