We are creating a tool to help runners accurately calculate their predicted finish times for races. To do this, we’re collecting real-life data from runners. You can help us by completing this brief survey, which takes about five minutes. We’ll ask a few basic questions about you, and you’ll need to provide finish times from at least two races of DIFFERENT lengths. Ideally, you’ll have run these races within a six-month period, but it is fine to include races that are more than six months apart so long as you were around the same age and were at roughly the same fitness level.