C.J. Castle


Dillon, Colorado

Coach C.J. has been racing and coaching triathlon and endurance sports for over 25 years. He spent close to a decade racing professionally, and has been coaching both at the university level and individually throughout his adult life. Following retirement from elite-level racing, he returned to graduate school earning a M.S. in exercise physiology, and continued to evolve both his knowledge of athletes and coaching, thus further developing his ability to help others reach their goals.

As he balances being a husband, father of four, career professional, and his love of competition, triathlon and endurance sports remain a cornerstone in his life.

C.J. is passionate about fitness as a lifestyle, and believes that every athlete’s personal journey toward their goals should enrich their lives. His experience has given him a unique understanding of how to balance the stresses of everyday life, family, career, and extracurricular commitments, with progress, health, happiness, and achievement of one’s goals. While he believes that the general path toward an endurance lifestyle is similar for everyone, he also believes each individual’s journey is highly specific. Through open communication, trust, and a cooperative relationship, he relies on a strategy of prescribing the most effective training at the right time for each athlete to reach their goals, while not having to sacrifice the other loves in their life.

While the 70.3 and Ironman distance hold a special place in his heart, he also races and has unique experience in events including Xterra, mountain bike endurance racing, mountain bike stage racing, running events of all distances, and many others. He has been fortunate to have the opportunity to help guide athletes of all levels (first timers, professionals, collegiate athletes, collegiate champions, and world championship qualifiers) to achieve their goals.

He believes that fitness helps us to be happier, healthier, and enriches our lives. C.J. looks forward to the opportunity to chat with you about your personal journey.

CJ Castle

Coaching Rates

$275 for 1 month
$750 for 3 months
$1,400 for 6 months
$2,500 for 12 months

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