The topic about how fast a person can walk has come up from time to time among writers, RPG gamers and in other situations. From the internet (wikipedia and the like) I find the average is 3 mph or 5 km/h. However, what can a determined person do (walking, not race walking)? As part of a fitness campaign by our city, I’ve taken to 30 minutes of activity a day. My walk today (the third day) on a paved but hilly path took 33 minutes and covered 3.5 km. I do walk fast, but I’m not a race walker. Nor do I have great stamina even for a person in his 50s. However, that’s a sustained speed of 6.4 km/h.