King's Highway 417, commonly referred to as Highway 417 and the Queensway through Ottawa, is a 400-series highway in the Canadian province of Ontario. It connects Montreal (via A40) with Ottawa, and is the backbone of the transportation system in the National Capital Region. Within Ottawa, it forms part of the Queensway (along with Ottawa Road 174 east to Trim Road) west to Highway 7. Highway 417 extends from the Quebec border (near Hawkesbury) to Arnprior, where it continues westward as Highway 17. Aside from the urban section through Ottawa, Highway 417 passes through farmland that dominates much of the fertile Ottawa Valley.