Tours of the largest dam in North America are available during the summer. The Visitor Center opens at 8:30 am and closes between 5:00 pm and 11:00 pm, depending on the season. There are also unguided historical walking trails in the vicinity. For more information visit https://grandcouleedam.org/, https://www.usbr.gov/pn/grandcoulee/, or (509) 633-3074.