Max elevation: 8344 ft / 2543 m Min elevation: 28 ft / 9 m Elevation change: 8316 ft / 2535 m
Max grade: 3.4% Min grade: -1.9% Steepness score: 42 + 343 + 1187 + 103 = 1675
Distance: 3186.86 mi / 5128.75 km Travel Time: 46 hours 31 mins
Difficulty
% Grade
Easiest
<5%
Easy
5-10%
Moderate
10-15%
Difficult
15-20%
Very Difficult
>20%
It looks like one possible route that might be flatter would be to go through Bismarck (North Dakota), 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 Portland to Portland (Maine). You can also view a 3-D map of Portland elevation or Portland (Maine) elevation.
Flattest Route
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 for campgrounds along the way, search for RV parks between Portland and Portland (Maine).