Age groups are determined by the riders age as of December 31.
Rider Groups
Ruggie 
Grommet
Menehune
Breaker       
Youth
Junior
Jams
Senior
Master
Legend
Kahuna
Methusel 
 
7 and under
8 - 9
10 - 11
12 - 13
14 - 15
16 - 17
18 - 22
23 - 29
30 - 39
40 - 49
50 - 59
60+