Commercial flights and vehicle rentals are available in two of Fort Union's gateway communities: Williston, ND, and Sidney, MT.
Located on North Dakota 1804, the park is 25 miles southwest of Williston, ND, and 24 miles northeast of Sidney, MT. The park's west parking lot includes sufficient space for school and tour buses as well as RV's. The smaller east parking lot is closest to the fort, includes reserved accessible parking.
There is no public transportation that directly serves the park, but Amtrak's Empire Builder does service Williston, ND, where vehicle rentals are available.
Know before you go!
Summer Months: Road construction is common in warm months and can add travel time to your journey. Winter Months: Roads can deteriorate quickly in poor weather. Plan the best route by checking current road construction status and current road conditions at North Dakota DOT Road Travel Map and Montana DOT Road Travel Map.
From Williston, ND, take U.S. 2 West to North Dakota 1804. Turn left on ND 1804. Travel approximately 20 miles, then turn right to stay on Highway 1804. In approximately two miles, the Fort Union entrance road will be on the left side of ND 1804.
From Culbertson, MT, follow U.S. 2 East to Bainville, MT. Turn south on Route 327. Follow 327 for a scenic 15-mile drive directly to Fort Union's entrance road.
From Sidney, MT, drive northeast on Montana 200 approximately 11 miles. At the traffic circle (roundabout), take the 3rd exit and head north on ND 58. After approximately 10 miles, turn left onto ND 1804. In approximately two miles, the Fort Union entrance road will be on the left side of ND 1804.
Last updated: November 10, 2020