Hiked from the TH to Sam Mack Meadows on Firday (7). On Saturday Kelly and I started at 6:45 with climbing gear to try the 'Swiss Arete' route. We had a long day and we run out of water. I was feeling light headed and dehydrated by the time we got back to camp at 8:45 PM. I was very happy we made through this one without getting hurt.