Welcome to Williston, North Dakota Services at highway - fuel - West side of highway. Attractions in and around the city of Williston: Buffalo Trails Museum - Fort Buford State Historic Site - Fort Union Trading Post National Historic Site - Frontier Museum - Missouri-Yellowstone Confluence Interpretive Center - Theodore Roosevelt National Park - North Unit. Pick up the trail of America's greatest legends in North Dakota, and you'll find yourself in a legendary adventure of your own. Lewis and Clark, Sakakawea, George Custer, Sitting Bull and Theodore Roosevelt lived out larger-than-life adventures here. Whether you follow in their footsteps and rediscover the past or blaze your own trail and discover what makes North Dakota legendary today, you'll find wide-open spaces and wide-open fun!