You're a runner if...

...you can use "easy" and 10 in the same sentence
...your shoes have more miles on them than your car does
...you go to a golf course to run
...you schedule dates around your training
...you've been to a golf course in every city but not to play golf
...you find yourself saying, "it's not really a hill..."
...you're running and you don't know why
...more than half the people you know don't know what XC is

(tbc)