The North Cascades are a section of the Cascade Range of western North America. They span the border between the Canadianprovince of British Columbia and the U.S. state of Washington and are officially named in the U.S. as the Cascade Mountains. The portion in Canada is known as the Canadian Cascades, a designation that also includes the mountains above the east bank of the Fraser Canyon as far north as the town of Lytton, at the confluence of the Thompson and Fraser Rivers.