For those of y’all coming out for the National at Sand Hollow, I have a little suggestion that will help you. Most of y’all don’t visit the desert southwest very often. Most of you likely live below 1,000 feet elevation. Over the next few days before you leave and as you travel this way, try and increase your daily water intake. North of half a gallon to a gallon a day. This will essentially “stock pile” your body before you get out here and will help you thwart dehydration and headaches associated with the (higher than where you live) altitude. Granted, this isn’t the Rockies and only 3,000 feet in places but it’ll dehydrate you quickly. You’ll sweat but not know it like you would in more humid environments because the sweat will be evaporating.