Midwest Triathlon Series

The Midwest Triathlon Series brings together three of the region’s most respected and athlete-favorite events for a true test of consistency, grit, and endurance. Held over three consecutive weekends, the series challenges athletes to race back-to-back-to-back while experiencing the best multisport venues the Midwest has to offer.

The series includes:

Matt Mason Memorial Cowboy Up Triathlon on Sunday, July 26th
Shawnee Mission Triathlon & Duathlon on Sunday, August 2nd
Kill Creek Park Triathlon, Duathlon, Aquabike, & Aquathlon on Saturday, August 8th 

*To be eligible for the Midwest Triathlon Series, participants must be registered for all three races within the series.

Designed for both seasoned competitors and motivated first-timers, the Midwest Triathlon Series rewards athletes who show up, dig deep, and race strong weekend after weekend. Complete all three events to earn series recognition and exclusive series swag while becoming part of a community that celebrates perseverance, sportsmanship, and Midwest pride.

Race three weekends. One series. Endless bragging rights.

Registration Note:
Athletes participating in the series must register for each race individually. Registration for the series does not include entry into the individual races, and athletes are responsible for completing separate registrations for all series events.

The Midwest Triathlon Series brings an exciting race distance to Shawnee, Kansas on July 26, 2026. Don't miss this beautiful event!