Deer Lodge Pass, elevation , is a mountain pass on the Continental Divide in southwestern Montana, about 11 miles southwest of Butte. It is traversed by Interstate 15 and is one of three crossings of the Divide by I-15 (all in Montana), the others being Monida Pass (on the border with Idaho) and Elk Park Pass north of Butte. Unlike most other passes in western Montana, Deer Lodge Pass is in the midst of treeless, rolling hills (reminiscent of Interstate 80 in Wyoming), and the grades on the highway are relatively gentle.