Dr. Lisa Shaver

Earthquake readiness or head in the sand? Where do you stand??!!
"At rest, the Mayo Clinic estimates men need about 3 liters of water a day, and women need 2.2 liters. But if you are exercising in the mountains, that may increase by 50%, to over 4 liters for men, and more than 3 liters for women."
At LEAST have a water filter handy!!

http://m.outdoorgearlab.com/Backpacking-Water-Filter-Reviews