Max elevation: 4373 ft / 1333 m Min elevation: 29 ft / 9 m Elevation change: 4344 ft / 1324 m
Max grade: 2% Min grade: -2.4% Steepness score: 18 + 236 + 755 + 60 = 1069
Distance: 1861.78 mi / 2996.24 km Travel Time: 26 hours 50 mins
It looks like one possible route that might be flatter would be to go through New Orleans, 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 Jacksonville to Mt Rushmore. You can also view a 3-D map of Jacksonville elevation or Mt Rushmore elevation.