Driving Across Hoover Dam: What You Need to Know

Yes, you can drive across Hoover Dam—but with important restrictions.

The Route

U.S. Route 93 crosses the dam crest via the Hoover Dam Bypass (Mike O'Callaghan–Pat Tillman Memorial Bridge), completed in 2010. The original two-lane dam roadway remains open for:

• Dam visitors (parking on Nevada side)
• Slow-speed crossing (pedestrians, bicycles, authorized vehicles)
• Tour buses and shuttles

Restrictions on the Dam Roadway

• No commercial vehicles (trucks, buses > 26,000 lbs GVWR)
• Weight limit: Typically 10,000–12,000 lbs (check current posting)
• No hazardous materials
• Narrow lanes, no shoulders—speed limit 15–25 mph
• Security checkpoints on both sides (vehicle inspection possible)

Better Option for Through Traffic

The Bypass Bridge (1,900 ft span, 900 ft above river) carries US-93 with four lanes, full shoulders, and 55 mph speed limit. It's the recommended route for all through traffic, RVs, and trucks.

Visitor Tips

• Park at the Nevada-side garage ($10) or Arizona-side lots (free, limited).
• Walk the dam crest (0.7 mi round-trip) for views of Lake Mead, intake towers, and the bypass bridge.
• Take the Powerplant Tour (elevator 530 ft down) or Dam Tour (deeper access).
• Allow 2–3 hours; summer heat is extreme—bring water.