5k runners always have a very wide range of times. For a 40 year old, some are able to run around 17-18 minutes, then there are the walkers who do it in around 40-45 minutes. … The overall average for a 40 year old male on a 5k course is between 22 and 25 minutes.or 50-year-old male runners (who are pretty good), probably 6-9 minutes. For the average runner, m … aybe 8-11 minutes. And for just a random guy off the street, most likely between 10 and 15 minutes.