This November, I am lacing up my shoes for a third time. Each of my two previous challenges were 40 days. This time, my goal is to run 100 marathons in 100 days around the world. This run is all about getting a global community together to make changes as we try to stop the world’s water supply from running dry. I am measuring the success of this expedition not in kilometres run, but in changes we make because #EveryDropCounts.