Qualla: Discovery Passage

Discovery Passage: Introduction

Sat, 21 Mar 2026 00:00:00 GMT

Photo credit David Stanley from Nanaimo, Canada, CC BY 2.0. Every cruise ship, cargo vessel, and fishing boat heading north from the Salish Sea to Alaska must pass through the same bottleneck: a 25-kilometre strait between Vancouver Island and the Discovery Islands where the water compresses to 750 metres wide and tidal currents can overwhelm an underpowered engine. Discovery Passage is the most important natural corridor on British Columbia's Inside Passage, and for centuries it has tested the nerve and seamanship of everyone who transits it.

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Image: David Stanley from Nanaimo, Canada | CC BY 2.0

Discovery Passage: Named for a Ship, Not a Moment

Sat, 21 Mar 2026 00:00:00 GMT

Photo credit Carport, CC BY-SA 3.0. Captain George Vancouver sailed through here in 1792 aboard HMS Discovery, charting the maze of islands and channels that define this stretch of the British Columbia coast. The passage took his ship's name -- or perhaps not directly. Some historical accounts credit Captain Henry ...

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Image: Carport | CC BY-SA 3.0

Discovery Passage: The Narrows Within

Sat, 21 Mar 2026 00:00:00 GMT

Photo credit Ymblanter, CC BY-SA 4.0. Discovery Passage stretches from the Strait of Georgia at Campbell River to Johnstone Strait at its northern end, with an average width of two kilometres. But the passage is defined by its tightest point: Seymour Narrows, where the channel squeezes to just 750 metres and currents...

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Image: Ymblanter | CC BY-SA 4.0

Discovery Passage: A Highway of Water

Sat, 21 Mar 2026 00:00:00 GMT

Photo credit Ymblanter, CC BY-SA 4.0. The traffic through Discovery Passage is constant and varied. Alaska Marine Highway ferries carry passengers and vehicles between the Pacific Northwest and southeastern Alaska. BC Ferries operates routes connecting Campbell River to Quadra Island, shuttling 18 round trips daily a...

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Image: Ymblanter | CC BY-SA 4.0

Discovery Passage: Islands on Either Side

Sat, 21 Mar 2026 00:00:00 GMT

Photo credit David Stanley from Nanaimo, Canada, CC BY 2.0. Quadra Island forms most of the eastern shoreline of Discovery Passage, its forested slopes rising directly from the water. At the northern end, Sonora Island takes over where Quadra ends, marking the transition into Johnstone Strait. On the western shore, Vancouver Island's coas...

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Image: David Stanley from Nanaimo, Canada | CC BY 2.0