Operating Hours: Open 9am - 6pm Pacific Time Zone. The Hoover Dam Tour Center is open every day of the year except Thanksgiving and Christmas. The Visitor Center is open from 9am - 5pm. Tickets sold until 4:15pm. Recommend visitors arrive by 3pm. Pedestrians are prohibited on top of the dam during hours of darkness. Fee: Adults (ages 17-61) $15.00; Seniors (62+) $12.00; Juniors (ages 4-16) $12.00, Military and Dependents (adults & seniors) $12.00, Children (ages 0-3) Free. Parking $10.00