Max elevation: 2609 ft / 795 m Min elevation: -31 ft / -10 m Elevation change: 2640 ft / 805 m
Max grade: 4.8% Min grade: -5.5% Steepness score: 19 + 546 + 3863 + 12 = 4441
Distance: 372.99 mi / 600.27 km Travel Time: 5 hours 39 mins
It looks like one possible route that might be flatter would be to go through Yuma, 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 Los Angeles to Phoenix. You can also view a 3-D map of Los Angeles elevation or Phoenix 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 Los Angeles and Phoenix.