The IRONMAN® 70.3® Boulder triathlon returns to Boulder County, Colorado and the foothills of the Rocky Mountains on Saturday, June 14. Amidst breathtaking views of the majestic Flatirons, athletes will kick off their IRONMAN 70.3-mile journey with a 1.2-mile swim in the Boulder Reservoir before embarking on the 56-mile bike course throughout Boulder County. The 13.1-mile two loop run course will take athletes along the Boulder Reservoir, up 63rd Street to Monarch, and all along the Dam Road before finishing back at Boulder Reservoir.
2025 IRONMAN 70.3 Boulder offers age group qualifying slots 2025 IRONMAN 70.3 World Championship taking place on Nov. 8-9 in Marbella, Spain.
Professional Field:
The 2025 IRONMAN 70.3 Boulder triathlon will feature a field of many of triathlon’s top male athletes battling for a piece of the $20,000 professional prize purse. Highlighting the field are the likes of defending champion Trevor Foley (USA), Colin Szuch (USA), Sam Appleton (AUS), Chris Leiferman (USA), and Matthew Sharpe (CAN).
Professionals compete for $20,000 prize purse plus 2MPRO WC slots.
- MALE PRO:
- 1 Trevor Foley USA
- 2 Colin Szuch USA
- 3 Sam Appleton AUS
- 4 Kevin McDowell USA
- 6 Connor Ford USA
- 7 Chris Leiferman USA
- 8 Sam Osborne NZL
- 10 Robbie Deckard USA
- 11 Matthew Raiphs ZAF
- 12 Justin Metzler USA
- 13 Andy Krueger USA
- 14 Ted Treise USA
- 15 Matthew Sharpe CAN
- 16 John Killeen USA
- 17 Danilo Pimentel BRA
- 18 Michael Arishita USA
- 19 Max Kohil USA
- 20 Devin Volk USA
- 21 Matthew Guenter USA
- 22 Connor Weaver USA
- 23 Klodian Mitri USA
- 24 Mitchell Ott USA
- 25 Branden Scheel USA
- 26 Kyle Warrick USA
- 27 Tyson Wieland USA
- 28 Thomas Inigo USA
- 29 Erik Mahoney USA
- 30 Joshua Berles DEU
- 31 Vincente Saraiva Jr BRA
- 32 Brian Folts USA
- 33 Yang Pan USA
- 34 Zach Aldrich USA
- 36 Andrew Shellenberger USA
- 37 Ryan Sedivec USA
- 39 Brian Llamas MEX
- 40 David Guenthardt USA
- 41 Rodrigo Alvarez Manzo MEX
- 42 Joaquin Pereda MEX
- 43 Kerman Alonso Vicente ESP
- 44 Ben Randall USA
- 45 Thomas Gordon USA
- 46 Jared Balady USA