In a stacked heat of the world's top rising talents, the Hawaii native topped the field to win in Huntington for the first time.
Hennessy emerged victorious from an all-star Final that was packed with former elite-level wildcards.
Caroline Marks vs. Brisa Hennessey vs. Samantha Sibley vs. Alyssa Spencer
Caroline Marks (USA) winning her Quarterfinal heat at the Vans US Open of Surfing.
Semifinal draws are set in the Women's Pro Junior after a big day with a few major early exits on hand.
Bethany Zelasko vs. Caroline Marks vs. Minori Kawai vs. Brisa Hennessy