'You might be a runner if...' goes the Running in the U. S. A. thing. See www.runningintheusa.com/More .   Of course, lottsa people MIGHT be runners. Perhaps there was a time when you no longer considered yourself just someone who runs--maybe races on occasion (for example, running your first marathon)

So, for exmple, you think you might be a runner when you consider a 10 mile run, a fun run, when will you KNOW (if you're a runner)?

(maybe, as indicated above, when you run your first marathon.)
Feel free to submit your own runner status evidence..