Doug Guthrie

Doug’s Triathlon Journey & Coaching Philosophy

Doug’s triathlon journey began humbly in 2002 as the swimmer on a sprint relay team—barely making it to the finish. But that modest start lit a fire. Fueled by determination, Doug set his sights on qualifying for the Ironman World Championships in Kona. It was a goal he chased for nearly a decade, navigating serious setbacks including a broken femur, a third-degree AC shoulder separation, and avascular necrosis. Still, he never gave up—and achieved his Kona dream nine years later.

Over the past 20+ years, Doug has raced extensively at nearly every level, completing:

• 29 Ironman-distance races

• Multiple Boston Marathon qualifications

• Numerous 70.3 events

• 9 Ironman World Championship finishes, with a personal best of 9:32 at Ironman Texas 2015—posting the fastest run split (3:20) in his age group

Additional career highlights include:

• Ultraman Florida Finisher (2023)

• 2nd Place - Ironman Chattanooga (2023)

• Course Record - IM Chattanooga 55–59 AG run split (3:36)

• Guiding Adrienne Bunn to a World Record finish at the 2023 and 2025 Ironman World Championship (12:41, PCID Division)

• 2nd Overall - Great Floridian Triathlon (2014, 2015), with a record-setting performance in 2015 just two weeks after racing Kona

• Florida State Masters Champion – Space Coast Marathon (2019, 3:10)

• USA Triathlon National & Masters Champion – Great Floridian Triathlon (2020)

Doug holds certifications from:

• USAT Level 1

• Ironman University

• TrainingPeaks Level 2

• 80/20 Certified Coach

• US Masters Coaching

He spent five years as the head coach of the YMCA endurance program, guiding over 50 athletes of all levels—from 5Ks to Ironman. Through Gu3 Training, Doug now supports athletes across the U.S., helping first-timers achieve finish lines and seasoned competitors qualify for world championships.

His coaching philosophy is simple but powerful: meet athletes where they are, simplify the path forward, and build a personal partnership rooted in communication, trust, and tailored training. Doug leads by example—constantly learning, growing, and inspiring others to do the same.