To operate a snowmobile on public land legally, you must register your snowmobile and display the registration decal.
- Snowmobiles must be registered at the County Treasurer’s office in the county where the owner resides.
- Registration of personal snowmobiles is permanent and remains valid until the machine is sold.
- The silver registration decal with “PERMANENT” on it must be affixed to the left side of the cowl.
- To operate a snowmobile, a fat-tire bicycle, or a motorized snow bike on a groomed snowmobile trail, a Montana resident must purchase a Trail Pass decal. The Trail Pass is valid for two seasons and must be clearly visible.