Hoover Dam is 34 miles (54.4 km.) from Las Vegas. 726 feet high (220.00 meters) from bedrock. Engineering wonder of the modern world. The Hoover Dam is open from 5am - 7pm. There are no powerplant or dam tours at this time. Visitor Center Exhibits are open to the public at 25% capacity. Guests may purchase Exhibit tickets inside the Visitor Center. Please visit website for further information.