The driving distance from Las Vegas to the Hoover Dam is about 34 miles. The trip from the Las Vegas strip to the top of the dam takes around 45 minutes.
To drive to the Hoover Dam from Las Vegas, follow I-515 South until it turns into US-93. On approaching the dam, take exit 2 to follow Nevada Route 172, which runs across the top of the dam. DistanceCalculator.GlobeFeed.com offers step-by-step directions and an interactive map of the trip. To visit the dam, park at the parking garage opposite the Visitors Center for a cash fee only and take an escalator or elevator to the reception area to purchase a ticket to visit the dam.