I grew up and am back in WY and I've driven Subaru wagons, hatchbacks, and now a coupe, for years in Wyoming and and Colorado. I've gone camping at elevation, as well as driven pilot car, and, when I was younger, used them to deliver pizzas in numerous front range cities including Silverthorne, CO, with neighborhoods over 10,000 ft. They are not the quickest thing on the highway but they handle the altitude just fine. Just remember to wind them up for the hills.