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Marjolaine Pierré (born 29 October 1999) is a rising French triathlon star known for her explosive rise in long-distance events. A former gymnast, she transitioned into triathlon at age 18 and quickly became France’s elite, winning the 2023 ITU Long-Distance World Championship in Ibiza and multiple Ironman 70.3 titles. Off the racecourse, she balances a degree in accounting and management with a high-profile relationship with fellow triathlete Clément Mignon. Her inspiring comeback from burnout in 2024 has amplified her legacy—cementing her as both a performance powerhouse and advocate for athletes’ mental well-being.

Notable Works & Achievements

Her crowning achievement arrived in May 2023, at age 23, when she won gold at the ITU Long-Distance Triathlon World Championship in Ibiza—securing France a historic double podium . That same year, she set a French record with an 8:49:42 winning time at Ironman Portugal

  • Detail: Info
  • Full Name: Marjolaine Pierré
  • Date of Birth: 29 October 1999
  • Place of Birth: Reims, France (grew up in Réunion from age 11)
  • Nationality: French
  • Occupation: Professional Triathlete
  • Relationship Status: In a relationship with Clément Mignon since 2021
  • Spouse/Partner: Partner: Clément Mignon
  • Children: None
  • Net Worth: Estimated €1M–€2M – earned from race winnings, sponsorships (Santini, etc.)
  • Major Achievements: 2023 ITU Long-Distance World Champion; multiple Ironman 70.3 wins; 4th at 2024 Ironman World Championships
  • Education: B.A. in Accounting & Management, Aix‑Marseille; Master’s in Nice

Current Relevance & Recent Updates

Returning from a physical and mental burnout in early 2024, Pierré’s summer comeback reaffirmed her status as an elite athlete. In May 2025, she claimed her third Ironman 70.3 win at Pays d’Aix—maintaining her momentum in the PTO World Rankings (World #15 as of June 2025) .

Career Beginnings & Key Milestones

Pierré’s transition from gymnastics to triathlon began in 2017–2018, culminating in a breakout 2021 season. She placed second in the French Long-Distance Championships and notched her first Ironman 70.3 victory in Cascais. These successes confirmed her pivot to professional competition

Charitable Work & Legacy

Marjolaine supports mentally healthy athletic practices, openly discussing burnout and athlete welfare. Through her “backers” platform, she encourages public support for athletes to sustain high-level performance and recovery

Although engaged in elite sport together, they remain private, focusing on mutual support through success and setbacks alike.

Fan-favorite for changing base locations from Réunion to help her coach, Yves Cordier, in Nice

At 18, she relocated to mainland France (Aix-en-Provence) for university, studying accounting and management while seeking athletic fulfillment. Seeking community and structure away from home, she joined a local triathlon club—and that choice ignited her destiny in long-distance racing

No public controversies—her transparency and advocacy uplift her public image.

Assets likely include a professional race bike, gadgets, and apartment in Nice, where she’s based for training.

Interesting Facts & Trivia

Started as a gymnast before dedicating herself to endurance sports.

First long-distance race in June 2021—runner‑up at French Championships, then won her first Ironman 70.3 within months.

Early Life & Family Background

Born in Reims, Marjolaine moved to La Réunion at age 11, growing up in a sporty household alongside her brother. As a kid, she excelled in gymnastics before shifting to cross-country and track events. The island’s lush landscapes and athletic culture profoundly shaped her discipline and resilience

Her recent social media exposure highlights a fourth-place finish at the 2024 Ironman World Championships and offers a glimpse into her training routines, inspiring fans with candid reflections and pro tips .

Turning pro in late 2021, she aligned with Waterfall Racing and began climbing international rankings. A standout moment came in October 2021 when she claimed the Ironman 70.3 Portugal crown—further solidifying her status

Personal Life & Relationships

Since 2021, Pierré has been in a high-profile relationship with fellow triathlete Clément Mignon (b. 1999). As a couple, they achieved a podium (3rd place) at the 2022 Triathlon Mixed Relay World Championship in Florida

Net Worth & Lifestyle

Her net worth is estimated at €1–2 million, drawn from race prize earnings (€100K+), sponsorships (Santini Cycling Wear, Waterfall Racing), and endorsements. Her active lifestyle includes eco-conscious choices like training near her grandmother’s forest in northern France

Future Plans & Cultural Impact

Looking ahead to 2025–26, Pierré is aiming for a breakthrough at the Ironman World Championships and possible Olympic-distance ambitions. Her influence is growing—particularly among female French endurance athletes and eco-friendly sporting communities in France and Réunion.

Pierré also recorded a career-high 4th place at the 2024 Ironman World Championships in Nice, demonstrating elite consistency at her second full Ironman distance

She also serves as an ambassador for Santini and is expected to launch training or wellness initiatives.

Disclaimer: Marjolaine Pierré Age wealth data updated April 2026.