Quintana Roo’s rookie pro has a recent age group race resume most would love to have, one awash with USAT Age Group National Champion titles and Ironman 70.3 victories, highlighted in 2024 by an overall women’s win—across all age groups—at Ironman 70.3 Oceanside.

She's backed in up with a brilliant pro debut that has seen her notch top-10 swim splits against some of the fastest pro fields early in 2025.

As the better half of the Jenna/Miguel Mattox duo that make up the popular Freestyle Tri YouTube series, it’s Jenna’s fun, approachable demeanor is a bastion to athletes that you can be at the top of your game, and have fun in the process. Incredibly relatable as an age group athlete, Jenna’s also as popular (if not more popular) than many of our pros at race event autograph signings at the Quintana Roo booth. 

Results 

2024

1st place AG/3rd Overall, USAT National Championships

2nd place AG, Challenge Vieux Boucau

1st place AG/1st Overall, Challenge Cap Quebec *

1st place AG, Ironman 70.3 Oceanside 

11th place, Challenge San Remo 

2023

9th place, Ironman 70.3 Chattanooga

11th place, Ironman 70.3 World Championship

2022

1st place, Ironman 70.3 Oceanside

1st place, Ironman 70.3 Chattanooga

*Fastest swim, fastest bike