How much water?

balzaccom

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How much water do you need to drink on the trail?

On our trip to Death Valley, we took what we hoped would be enough water for the two of us for an overnight backpacking trip: Slightly more than a gallon per person for 24 hours. In terms of water bottles, it was 14 quarts, and that turned out to be about right. We drank three quarts during our hike to the campsite (this was, after all, Death Valley) and then used another three quarts for dinner. And then used another two quarts for breakfast the next day…and drank two more on the way out. So we drank ten quarts (five quarts per person) over the 24 hours of the hike. We were a little under-hydrated on the first day, as we were hiking in the afternoon sun. And we had some water left over (which is not a bad thing in the desert). If we were to do it again, we’d probably take about the same.
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That's a photo of Death Valley above...looking down towards Badwater and the lowest spot in the Western Hemisphere...

In the Sierra, of course, you can fill your water bottles along the way. We generally only take four quart bottles for the two of us on those hikes. We always camp near water, so we don’t need to worry about carrying the water for dinner or breakfast. And we start the day with four full bottles---enough to get us through lunch and into dinner. Some people prefer to carry less weight, and may only carry one bottle per person---or even hike from stream to lake and drink what’s available. But we don’t like to take the time to pump and filter while we are on the trail—we prefer to hike. So we carry a little extra weight, and stop less often to pull out our water filter.

Either way works, as long as you keep drinking enough water.
 
I think it totally depends on the factors such as the temperature, aridity, and how much the individual perspires, etc. On my last hike my hydration tubes froze before I could take my first sip so I went 7.5 hours over strenuous terrain without any water and felt fine (I could have drank directly from my bladder if needed but I felt fine and it was too cold to stop). I'm sure if I pulled those shenanigans in southern Utah in June I'd be a statistic.
 
Very subjective. I sweat a lot and tend to drink close to a gallon of water on a normal day. Probably twice that when I am hiking.
 
We haven't hiked in the desert for a long time and are usually not too distance from water sources. I just pack the one water bottle unless I'm hitting a dry trail section and then will fill two or partially fill the bladder. I do stop and filter water as needed. With the MSR Hyperflow, 15 pumps and 30 seconds it's full. Once in camp, I just fill the bladder and am good for both dinner and the following breakfast. Made the bladder from a 3 L box wine version with a sewed up nylon cover. It is at least 25 years old and it holds 5 L if totally filled. That's it hanging on the tree limb in 2012 at Noble Lake in the Roots.
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We usually heat 2 L for both breakfast and dinner if using the freeze dried dog food. 1.5 L with the regular dog chow.
 
If I were to do an equivalent Death Valley overnighter this time of year I'd probably carry a full 2L platypus with a drinking hose for the trail, full 4L MSR DromeLite bag, and maybe a bottle of Gatorade. 2L is my pretty much my standard trail allowance, even if I'm hiking in the Mountains where water is plentiful, I'm probably going to be using a chemical water treatment that requires some wait time, so once I have drunk my bladder down by half or so, I'll have a quart nalgene bottle in the queue with some Aqua MIra in it.
 

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