An estimated 670,000 sockeye have entered the Columbia River system this summer on a nearly-1,000-kilometre upstream journey toward spawning grounds in creeks and rivers, according to fish biologists with the ONA.

More than 80 per cent of those fish are destined for Canadian waters near Osoyoos, B.C., in the south Okanagan, said Richard Bussanich, the organization's head fish biologist.