When running a marathon is no longer enough

I’m running the Beachy Head Marathon tomorrow. It is my ninth marathon in the 11 years I have been old enough to compete over 26.2 miles. Following a 2.50.23 London in April and a 3.15.39 Lakeland Trails in July, Beachy Head is my third marathon this year. Prior to 2011, I had never run more than one marathon…