Max elevation: 12092 ft / 3686 m Min elevation: 5324 ft / 1623 m Elevation change: 6768 ft / 2063 m
Max grade: 40.5% Min grade: -44.4% Steepness score: 139 + 4444 + 32457 + 7 = 37046
Distance: 209.53 mi / 337.2 km Travel Time: 3 hours 48 mins
It looks like one possible route that might be flatter would be to go through Steamboat Springs, 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
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Note that this route shows high grade, which may be due to a bridge or unusual land feature. Land elevation may be different than road elevation, so always check any spikes in elevation or grade. If you're planning to drive in the winter and you want to avoid snow, check the road conditions from Aspen to Boulder. You can also view a 3-D map of Aspen elevation or Boulder 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 Aspen and Boulder.