Last year, I ran a 5K race on Thanksgiving Day and a second 5K on that following Saturday.  It was the first time I ran two races in the same week, and it was in the midst of my training for my first Half Marathon (at Disney).  This year, I also have two races planned, a 5K on Thursday and a Half Marathon on the following Saturday (the same race only instead of the 5K last year, I am running the Half).