Drew Shellenberger

Coach · HAX Athletic Club - Boulder, Colorado

Drew is a former short course pro triathlete now racing Half Ironman’s. He grew up swimming and running through high school and took his elite license at the age of 17. After 4 years of traveling the world getting the race in multiple Junior and U23 World Championships, he decided to move towards long course racing. In 2026, he has been focusing on his bike power numbers, and has an Ironman 70.3 of 4:00:38.

He is now living in Boulder, CO to be in an environment more conducive to being a pro triathlete and chasing improvements for his athletes he coaches. One of Drew's core beliefs is consistency over time is where improvements are made.

“Hero workouts look awesome on Strava and social media, but the unglamorous workouts when you're alone is where the major strides can be made.”

Drew is a responsible coach when it comes to communication, programming and making sure his athletes are on track to hit their goals.

Since starting coaching in 2023, Drew has coached athletes to multiple Age Group World Championships qualifications and more PR's than he can count.

Any goal you want to tackle, Drew is eager to help you find the training regime to work best for you.