These are the age groups (and order) that swimmers compete in:

6 & Under Girls

6 & Under Boys

7/8 Girls

7/8 Boys

9/10 Girls

9/10 Boys

11/12 Girls

11/12 Boys

13/14 Girls

13/14 Boys

15/18 Girls

15/18 Boys

*Their age group is based on their age on June 15th