Athletes can only be registered under one category. For example, you cannot register for Clydesdale and age group at the same time. Participants must select their category when they register. Athletes must race in the correct wave and category and will only be awarded in the category in which they declared prior to the start of the race.
If for example you register and race in Athena, you can not win in the Female Age Category even if you finish with a faster time.