King's Highway 404 (pronounced "four-oh-four"), also known as Highway 404 and colloquially as the 404, is a 400-series highway in the Canadian province of Ontario connecting Highway 401 and the Don Valley Parkway (DVP) in Toronto with East Gwillimbury. The  controlled-access highway also connects with Highway 407 in Markham. Highway 404 provides access to the eastern edge of Richmond Hill, Aurora and Newmarket, in addition to the southern edge of Keswick.