Water is the big variable on the ~10 miles without water sources. I am moderate sweater and I have done the summit seven times. I have ran out of water when carrying two liters and 4 liters. The former on just before Trail Crest on the return, the latter just before the summit on the way on a a day that did not see 40 F...thank God for snow and sunlight.
I take 4 L just in case something happens up high. I am usually into the forth by the time I return to Trailside Meadow...my usually fill it up spot.
