Boiling point of water = boiling point at specified altitude ± boiling point barometric correction. According to this calulation, the estimated boiling point at 9400 feet is approximately 192.5 F. The normal boiling point is 212 F. What does this mean to you? Well, probably not a whole lot.
Use a large pot with a lot of water. Give your pasta plenty of room to breath. In order to get your water to boil quickly – or quicker, cover your pot, flame on high. When your water comes to a boil, drop in one piece of pasta. It will look as though the water is eating the pasta. It will calm after a moment, and then pour the rest of your pasta into your pot. NEVER place your pasta into a pot that is not rapidly boiling — you will get some nasty, mushy crap if you do. If you cover your pot after you put in the pasta, you will have a foam explosion on your hands. Cover partially, but keep a close eye on it. It will boil over. Stir frequently. If you start experiencing that crazy foam madness, blow on it, and it will subside. Some people think if you but a tablespoon of olive oil in the water, it will keep it from foaming up. It’s never worked for me, but you can try it.
Good luck.