IRONMAN 70.3 Boulder will change calendar dates from 2023

August 3, 2022

The 21st edition of the long-running Colorado event will take place on June 10, 2023; Pre-sale registration opens Thursday, August 4, 2022 by visiting,

BOULDER, Colorado / TAMPA, Florida. (August 3, 2022)/ENDURANCE SPORTSWIRE / – IRONMAN today announced that IRONMAN 2023® 70.3®The Boulder Triathlon will move to a new calendar date beginning in 2023. A staple of Colorado and the IRONMAN calendar since 2002, the long-running event will now take place on Saturday, June 10, 2023, with pre-sale registration opening Thursday. August 4, 2022 by visiting,

“We are proud of the legacy that has been built over the past 20 years here in Boulder,” said Tim Brosious, North West Regional Manager for the IRONMAN Group. “Anyone who has run here over the years can attest to the unforgettable experience of running here in the footsteps of the Rockies. There’s no better place to host a summer race than here in Boulder and we know this new June date will continue to showcase the beauty of Colorado. We are so grateful to the Boulder Convention and Visitors Bureau, and the City and County of Boulder, for their continued support of this long-running and popular IRONMAN 70.3 Boulder event.

For nearly two decades, athletes from around the world have been welcomed by the welcoming community of Boulder, Colorado. Boulder offers an outdoor playground for endurance athletes. Boulder caters to outdoor enthusiasts and offers not only epic trails and outdoor activities, but also world-class restaurants, shopping, events, and craft beer and spirits. Boulder gives you a taste of all of Colorado.

The 20e The edition of the IRONMAN 70.3 Boulder Triathlon set to take place on Saturday, August 6 will begin by taking athletes along a 1.2-mile swim in Boulder Reservoir. After transitioning to the bike, athletes will traverse the rolling hills of Boulder County with stunning views of the Flatirons before beginning the race. The 13.1-mile running course runs along Boulder Reservoir, up 63rd Street to Monarch and all the way to Dam Road. Most of the route is on dirt roads.

Pre-sale registration for the 2023 edition of the IRONMAN 70.3 Boulder Triathlon will open at 12:00 p.m. EST on Thursday, August 4, 2022. The 2022 and 2023 editions of the IRONMAN 70.3 Boulder Triathlon will offer qualifying slots for the VinFast IRONMAN 70.3 World 2023 Championship® race in Finland.

For more information on the 2023 IRONMAN 70.3 Boulder Triathlon, visit Athlete inquiries can be directed to For more information on the IRONMAN brand and the global event series, visit Media inquiries can be directed to


About the IRONMAN Group

The IRONMAN Group operates a global portfolio of events that includes IRONMAN®Triathlon series, the IRONMAN®70.3® Triathlon series, the IRONMAN®Virtual Racing™ (VR™) Series, 5150™ Triathlon Series, Rock ‘n’ Roll®Running Series, The Rock ‘n’ Roll Virtual Running™ Series, IRONKIDS®World Triathlon Championship Series, premier racing events including the Standard Chartered Singapore Marathon™ and City2Surf®UTMB®World Series events including Tarawera Ultra and Ultra-Trail Australia™, Epic Series™ mountain bike races including the Absa Cape Epic®road cycling events including the Haute Route®, and other multi-sport races. The IRONMAN Group is the largest mass sports operator in the world, bringing the benefits of endurance sports to more than one million participants each year through the company’s extensive offerings. Since the creation of the iconic IRONMAN®brand and its first event in 1978, athletes proved that ANYTHING IS POSSIBLE®crossing finish lines around the world. Starting out as a single race, the IRONMAN group has grown into a global sensation with hundreds of events in over 55 countries. The IRONMAN group is owned by Advance, a private family business. For more information,

About Advance

Advance is a privately owned, family-owned company that owns and invests in companies in media, entertainment, technology, communications, education and other promising growth sectors. Our mission is to build the value of our companies over the long term by promoting growth and innovation. Advance’s portfolio includes Condé Nast, Advance Local, Stage Entertainment, The IRONMAN Group, American City Business Journals, Leaders Group, Turnitin, 1010data and Pop. Together, these operating companies employ more than 17,000 people in 29 countries. Advance is also a major shareholder in Charter Communications, Discovery and Reddit. For more information, visit