by Basiliscos V Argomedo on August 6th, 2010, 6:06 am
If realism is the largest concern in travel times, walking 50 miles a day seems extremely generous. Purely the walking portion would have a very high caloric requirement, close to 5,000, but that should be adjusted for weight. This would also suck up lots of time and energy for the hunting, gathering or fishing required to find and prepare that much food, making 12 hour walks extremely difficult. Water would be simple if you were taking a route along a river, which is popular for that reason.
50 miles a day would be the equivalent of a forced march for experts trained for that sort of thing, and even then, the very best trained marchers would only be to keep that pace for a few days. Keeping a pace of 20 miles a day is much more realistic for an experienced, well trained walker. Distance covered is the largest concern, walking versus running doesn't matter that much, as they have similar energy requirements for similar distances.
Things aren't all that much faster with horses either, simply because horses have to eat a great deal, and without a constant source of high quality grains, it takes them a long while to do it. They also tend to get tired faster when carrying people.
Of course, this would mean travel between cities would be discouraged more so than it is now, but it doesn't make sense to have land travel times be so close to sailing travel times.