Q: Age on race day or age you were when you ran that time?

Km: This question was asked in reference to qualifying for the Boston Marathon. Basically, you can qualify for the race 13 months before you actually run it (i.e., for 2014, the qualification period begins on Sept. 22, 2012). So, what happens if you qualify in 2012, don't run to 2014, and manage to hop up an age group in that time? You only have to worry about hitting the qualifying time for the age that you'll be on race day, so run fast while you're still young!