Elevation from Martinsburg to Cumberland (Maryland) via
Max elevation: 1635 ft / 498 m Min elevation: 374 ft / 114 m Elevation change: 1260 ft / 384 m
Max grade: 14.5% Min grade: -12% Steepness score: 13 + 1454 + 13248 + 3 = 14718
Distance: 77.69 mi / 125.03 km Travel Time: 1 hours 15 mins
It looks like one possible route that might be flatter would be to go through Everett (Pennsylvania), 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