Originally Posted By: hikermor

I have often gone out in warmer conditions (southern Arizona deserts on SAR operations) carrying 1.5 to 2 gallons of water when I expected to reach a reliable water source by sundown. You carry what you must to survive in the ambient conditions. At least with water your carry weight declines during the excursion.


I agree completely that you take what you need. Since you are talking Arizona a gallon a day seems about right and that was just drinking water when I was there (many years ago now).
What I meant about prohibitive was over several days.
1.5 to 2 US gallons means 12 to 16 lbs of water for each day until you resupply. It adds up pretty fast.
It could make sense caching water on your route if you intend to be in for a few days.
Here where water is easy we usually end up carrying more insulation and other gear instead.

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