Max elevation: 11655 ft / 3553 m Min elevation: 1536 ft / 468 m Elevation change: 10120 ft / 3085 m
Max grade: 7.7% Min grade: -7% Steepness score: 98 + 772 + 6944 + 24 = 7838
Distance: 749.18 mi / 1205.69 km Travel Time: 11 hours 1 mins
It looks like one possible route that might be flatter would be to go through Raton (New Mexico), but make sure you double check everything if you're planning a road trip.
Elevation data comes from different sources and may not reflect true
driving conditions, so talk to other RVers if you're concerned about
steep grades. If you're planning to drive in the winter and you want to avoid snow, check the road conditions from Denver to Las Vegas. You can also view a 3-D map of Denver elevation or Las Vegas elevation.
These are some of the possible highways along this route. Use the GPS in your car to verify all driving directions. If you're looking campgrounds along the way, search for RV parks between Denver and Las Vegas.