Looks like a nice course. The locals must be used to the altitude, but I'm not sure if I've been that high up apart from on skiing holidays. One of these days I'll have find a course over here, but it seemed to be a bit of a drive to the nearest one.
It wasn't on this course, but the highest we went in our trip was close to 13,000 to 14,000 feet which is about as high as some of the highest peaks in the Swiss Alps I think. The altitude is no joke, it makes even normal things deceptively difficult. As I said on the Red Rocks post, my sister in law runs marathons and even she was struggling that first full day. I hope you find one eventually.