I shot these at the Calgary Marathon in 2016. I downloaded the marathon course map and looked for a good spot to take my photos. I figured that the starting line and finishing line would be very busy and probably best to be avoided. So I picked a spot approximately half way around the course making sure that the marathoners were running into the early morning sun (so the light was at my back) and I waited. By this point in the race, everyone had spread out so I had a steady stream of marathoners coming my way. As I was shooting, an interesting thing started to happen: everyone started waving at me and posing for the photos as they ran by. I shot three rolls that day but unfortunately two were lost in the mail.