The Sea-to-Sky Corridor, often referred to as the Corridor or the Sea to Sky Country, is a region in British Columbia[1] spreading from Horseshoe Bay through Whistler to the Pemberton Valley and sometimes beyond to include Birken and D'Arcy.

From Whistler on up, the region overlaps with the older and more historic Lillooet Country, of which Squamish, at the region's centre, was once the southward extension in the days when it was the rail-port terminus from the Interior, via Lillooet, and accessible from the Lower Mainland only by sea.

There is little development other than resource extraction outside the immediate vicinity of the highway and the towns along it, hence the linear character of the region.

As with the overlap with the historical region known as Lillooet Country from Cheakamus Canyon northwards, the southern part of the region overlaps with Greater Vancouver and also with a more general and less unified but identifiable region around Howe Sound, the islands and western shore of which are respectively part of the Gulf Islands and Sunshine Coast.

Locations beyond Mount Currie-Lillooet Lake along the route of the rail line and the frontier-era Douglas Road are not usually considered in the Corridor, but sometimes are even though they are not on the Sea to Sky Highway.