Not much new to add, everyone's covered it all pretty well. But one suggestion to take for what it's worth. Some folks will take the medication Diamox before making a rapid transition to higher elevation (i.e. from sea level to over 6,000'). There's really no scientific evidence to back it up (hence, why take it?) but moreso people believe it helps reduce some of the clinical symptoms of acute mountain sickness when travelers do take it. Speak with your physician about it and he'd be able to write a prescription. There's no physical conditioning you can do at sea level which will prepare you for altitude (but lifting weights certainly will help in other areas of skiing), it's all in how your body physiologically adapts to a lower pressure of oxygen. And that's how it's believed Diamox helps, by stimulating some of the process by which your body adapts to higher altitudes (will spare the entire respiratory process
). I've taken it a few times before and not had any problems (the major side effect is that you pee a lot), and also not taken it and fortunately not had any problems either. It's all up to you. As mentioned in a previous post, thousands of people do this every day without problems. Just remember to drink lots of water (have a CamelBack or something), and have a great time.