North of Granby and northwest of Grand Lake, the Grand Lake Snowmobile Trail System has an extensive network of snowmobile trails. The South Supply area has moderate to varying terrain with plenty of snowmobiling trails.
To reach the snowmobiling trailhead for the Grand Lake Snowmobile Trail System from Granby, head north on SR34 towards Grand Lake for 8.7 miles. Turn left heading northwest on CR4 for 2.9 miles. Veer left on Stillwater Pass Road for 0.5 miles to the large snowmobile trailhead parking area on the left.
Overall, the Grand Lake area has 150 miles of groomed snowmobile trails at elevations ranging from 7,000 to 10,000 feet.
One nice thing about riding in the Grand Lake area is that the town allows snowmobiling on city streets.
All snowmobiles operating on federal lands within Colorado including the Grand Lake snowmobiling trails 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.