The thing that teases the mind over and over for years, and at last gets itself put down rightly on paper - whether little or great, it belongs to Literature.
But it is nice to know that you have other races lined up, because sometimes you can get so focused on your next marathon that it can become kind of unhealthy in some ways. So it's nice to have something else to slap you in the face and say, all right, there is life after the Olympics.