If you know how many miles are in 10 kilometers... then you might be a runner.

If you know the name of the last runner to win the 5k, 10k, and Marathon races at the same Olympic games... than you might be a runner.

If you know who Rosie Ruiz is and what year she didn't do the "Boston Marathon"... then you might be a runner.

If your average dinner is a whole meat lover's pizza with a six pack of beer, and you only weigh 102 pounds... then you might be a runner.

If you celebrate your 50th birthday by running 50 miles and then go to a party in your honor... then you might be a runner.

If your best ten mile time is lower than your age and your resting heart rate is lower than your best ten mile time... then you might be a runner.

If you run a race in Boston in April, Atlanta in July, and New York in October... then you just might be a runner.

If you have any surgical scars from the hips on down and you have never birthed a child... then you might be a runner.

If you have run the "Western States 100" more than one time... then you might be a runner.

If you can name one thing that Grete Waitz and Bob Kempainen have in common other than the fact that they run... then you might be a runner.

If you can say "fartlek" without getting embarrassed... then you might be a runner.

If the frame around your licence plate says "My other car is a pair of New Balances"... then you might be a runner.

If you fly your flag at half mast every time your shoe company New Balance discontinues the model you've just committed to for life... then you might be a runner.

If you race every weekend of the year, but have never run a race on July 4th... then you might be a runner.

If you have to rent extra storage space in order to house your T-shirt collection... than you might be a runner.

If you can't cut your toenails without your legs cramping up... then you might be a runner.

If you can quote from Sheehan or Galloway... then you might be a runner.

If you're trying to pass someone in a race and your first question to that person is "How old are you?"... then you might be a runner.