Ticketing GuidelinesWhereas tickets for the tour of the power plant can be booked online and in advance, tickets for the Hoover Dam tour can only be purchased on the day, at the dam itself, and will be issued on a first-come, first-served basis. The Hoover Dam and the Visitor Center are open every day except Thanksgiving and Christmas.Safety InformationThe Hoover Dam tour is not wheelchair accessible, and children must be over eight years of age to go on a tour. The dam tour is not suitable for people with claustrophobia or those who have been fitted with a pacemaker. You will be required to go through a security checkpoint before starting the tour, and any bags or camera equipment will be scanned.Driving on the DamIf you decide to drive over the old road on the top of the Hoover Dam, you won't be allowed to stop your vehicle at any time. Pedestrians are not allowed to walk on the Hoover Dam after dark.