Montana State Highway 1 (MT 1) is a state highway in Deer Lodge and Granite counties in southwestern Montana, United States, extending west and north from the Anaconda I-90 Junction to Drummond. Both the beginning and endpoints of the road are on Interstate 90. It is known as the Pintler Scenic Loop and provides access to the community of Philipsburg as well as the Georgetown Lake area and the Discovery Ski Area.