The Sakakawea Trail System is in the northwest corner of the state and is open to snowmobiling. This system is two trails that meet at Lake Sakakawea. Williston, which is the north part, comes southeast along the shore of Lake Sakakawea for about 16 miles then goes north for 4 miles and turns west to make a loop. The whole system is about 70 miles. They are maintained by the Williston Trail Riders and the Prairie Ramblers of Watford City.
In Williston, the snowmobiling trailheads for the Sakakawea Trail System is east on SR 1804. Park on the eastern side of town.
Overall, Sakakawea Trail System is the 11th most popular snowmobile trail of all 17 snowmobiling rides in North Dakota.