We used to come back from a three or four day trip having lost 3-4 pounds of weight...and feeling excited about that (like everybody else, we probably have a bit of weight to lose!) But when we would gain that weight back in just a day or two, we realized we were just losing water---and getting dehydrated.

Now we drink more...and feel better for it.
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Check our our website: http://www.backpackthesierra.com/

Or just read a good mystery novel set in the Sierra; https://www.amazon.com/Danger-Falling-Rocks-Paul-Wagner/dp/0984884963