Where's The Oxygen???

I am at our companies annual meeting in Beaver Creek, Colorado (altitude around 10,000 ft). It's beautiful here (the image you see is taken from my room. The golden trees are Aspens) but there is no oxygen. Ran up a flight of stairs and was gasping for breath! Guess I won't be riding the exercise bike tonight. Wish the family was here!!! Miss you guys!! Will be here all week...leaving Friday.