Southwest of Missoula in the Clearwater National Forest, the Lolo Pass region bridges both the Lolo and Clearwater National Forests high in the Bitterroot Mountains. Snowmobilers should not underestimate the size or the ruggedness of the Bitterroots! The Lolo Pass Winter Sports Area (Idaho Park-n-Ski permit required) is open to snowmobilers from December through March. This heavily forested area provides access to over 200 miles of groomed snowmobile trails at elevations ranging from 3,200 to 6,500 feet.
Overall, Lolo Pass is the 9th most popular snowmobile trail of all 19 snowmobiling rides in Idaho.