I'm a very fast walker in everyday urban life. While I'm just 5' 10", my normal nightly walking route of 2.9 miles is generally covered in 45 minutes. That's a tad over 3.75 mph. Of course, that's a fairly flat route with one gradual downhill slope and one very steep uphill jaunt. I'm not superfit or anything, I just walk fast. confused Maybe it comes from 25 years of cooking professionally.

Things are different in the bush, of course.
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“I'd rather have questions that cannot be answered than answers that can't be questioned.” —Richard Feynman