That’s a fair thing to be aware of while you are in the high country. When in Breckenridge, it’s important to notice how you are feeling so that you can act accordingly. Remember, when in doubt, go down in elevation and hydrate. Especially if you’re on the mountain, it’s vital to notice your symptoms (and your children’s symptoms). If you're wondering if there's any way to prep, there is: If you’re flying, drink loads of water the night before your flight, and when you land.