road altitudes
as our old RV (and us) don't like crossing mountains... what is the lowest altitude going from the west coast to the east coast across the mountains. i was told that I10 is flat but elpaso is 4000 f...
Forum Discussion
I-10 in the south. I don't know of one in the north. I-80 goes over Donner Pass after all. And it gets to almost 9000 feet in Wyoming. I haven 't spent much time on I-90 but I'm sure it has some steep grades and high altitudes along it's route.
Maximum grade permitted on any interstate is 6%.
Maximum grade permitted on any interstate is 6%.
