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Q&A Formula for rough amount of water to carry on hike?

I walked Hadrian's Wall recently carrying an 18kg backpack. It was hot, sunny weather for six of the seven days. I had a 2 litre bladder of water and by the end of each day I had ran out of water...

posted 12y ago by Richard Holyoak‭  ·  last activity 12y ago by System‭

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