Northwest Passage

The Northwest Passage is a sea route through the Arctic Ocean, along the northern coast of North America via the waterways amidst the Canadian Arctic Archipelago, connecting the Atlantic and Pacific Oceans. The various islands of the archipelago are separated from one another and the Canadian mainland by a series of Arctic waterways collectively known as the Northwest Passages or Northwestern Passages.
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Noun
1. a water route between the Atlantic and the Pacific Oceans along the northern coast of North America; Europeans since the 16th century had searched for a short route to the Far East before it was successfully traversed by Roald Amundsen (1903-1906)
(hypernym) path, route, itinerary