West of Del Norte near South Fork, there is an extensive snowmobile trail network maintained by the Silver Thread Outdoor Recreation Club of the San Luis Valley. There are over 250 miles of maintained and groomed snowmobile trails in the South Fork region. A centrally located snowmobiling trailhead is right in the town of South Fork, just north of the intersection of US160 and SR149.
If you are looking for a challenging route within this trail system. Head west on US160 from South Fork to Park Creek Road. Turn left heading southeast on Park Creek Road - Summitville and there is a trailhead parking area immediately on the right. Park Creek Road is groomed and provides access to the Tucker Ponds Trail leading up near the Continental Divide.
All snowmobiles operating on federal lands within Colorado are required to be registered with Colorado State Parks. This registration permit is available at most National Forest ranger offices and at some chamber of commerce offices. It is highly recommended to purchase the $3 annual Colorado Search And Rescue Card (CORSAR) prior to snowmobiling to help reimburse local search teams should they be needed.