Originally Posted by
Mark G
I had a simple way of working out a time factor for races. For example if a race was 13 miles and 5000' adding them together gives 18 - if I could run that in 3hrs, ie 180 minutes, the factor was 180 divided by 18, so 10. It proved pretty accurate for me up to 4 or 5 hours. For longer races/events you could amend the factor based on your performance in training. You could also amend it for metric measurements I suppose (but good luck metricating time) My factor of 10 worked well for me in my 30s and 40s - one advantage of it is that you can amend it as you age. Sadly mine is now more like 15.