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How much water you should drink depends on three main factors: climate, your level of exertion and your own individual needs. 1  Climate: When hiking in hot and/or humid conditions, one litre per hour is generally recommended. Climate: When hiking in hot and/or humid conditions, one litre per hour is generally recommended. 2  Same goes for altitude, where although the temperature may be cooler, the air is drier and thinner. 3  In milder conditions at lower altitudes, half of the above mentioned quantity should normally suffice.
Special equipment required: Stop watch and scale. The above chart shows that the heavier the pack weight the slower the hiker's speed. In my experiment, my speed with pack weights of 0 pounds (no pack), 10 pounds (base pack weight) and 30 pounds (maximum pack weight) was 2.9 mph, 2.75 mph and 2.61 mph respectively. These speeds are my hiking speed for these particular pack weights -- of course, your speed will vary. Notes: