I'm new to the site.I will be hiking in Medicine Bow mountains soon with my 14yr old daughter who has Type 1. She is use to exercise-soccer,mountain biking,track and field and mini triathlons but I don't know how higher altitudes will effect her sugars. We live in Michigan(800ft elev) and will be hiking at 7000-9000ft elev. She is on an insulin pump and has a Dexcom Continuous monitor (recommend it to any one doing sports with diabetes for tracking low and highs). Any advice or things I need to watch for? Thanks for any and all input.