Has anyone ridden in it? How is it? I like climbing, so that's not a big deal. What is a big deal is the elevation. I've mountain biked at 6k feet and got acclimated in a bit. How do I train for the elevation at Mammoth? Looking at the profile, it hits 8k feet a couple of times and doesn't go below 6k much. I'm used to riding at sea level for the most part.