Max elevation: 1869 ft / 570 m Min elevation: 40 ft / 12 m Elevation change: 1829 ft / 557 m
Max grade: 14.7% Min grade: -11.1% Steepness score: 17 + 1472 + 6999 + 12 = 8500
Distance: 379.54 mi / 610.81 km Travel Time: 6 hours 7 mins
It looks like one possible route that might be flatter would be to go through Hershey, 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 Buffalo to Philadelphia. You can also view a 3-D map of Buffalo elevation or Philadelphia 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 for campgrounds along the way, search for RV parks between Buffalo and Philadelphia.