Your facility need not be equipped with a track to take advantage of measured runs. CrossFit is located in an industrial park and we've measured and marked from our gym door 100, 400, 800 and 1,500-meter loops. We call these "urban runs" and they are fraught with obstacles like mossy gutters, cars - moving and parked, and of course, dogs. For many of our athletes this has greater application and relevance than loops on a rubber track.