Alberta Provincial Highway No. 501, commonly referred to as Highway 501, is a highway in the province of Alberta, Canada. It runs west–east from Highway 5 east of Mountain View as gravel to Cardston, then pavement through Del Bonita and Milk River to Highway 879, then gravel again to the Saskatchewan border. It is also known as 9 Avenue in Cardston, and Centre Avenue in Milk River. From Highway 889, on through to Saskatchewan, it follows the path of the Red Coat Trail.