The 2026 Bolder Boulder has unveiled its pro fields, with the U.S. set to field teams for both men's and women's races in the International Team Challenge. Notably, the races will be without consecutive champions Conner Mantz and Grace Loibach Nawowuna due to injuries. The U.S. men’s teams feature a mix of seasoned competitors and emerging talents, including a squad of former Colorado runners. Both races are highly competitive; however, the reigning records remain intact as champions take the year off.

By the Numbers
  • Grace Loibach Nawowuna set a women's pro race record of 31 minutes, 51 seconds in 2025.
  • Conner Mantz has won three consecutive Bolder Boulder men’s pro races.
Yes, But

While the competition will be fierce, the absence of reigning champions Mantz and Nawowuna may level the playing field, offering new contenders a chance to shine.

State of Play
  • Two U.S. teams will compete in both the men's and women's races for the International Team Challenge.
  • Competitors include notable athletes like Casey Clinger, Ryan Ford, and Biruktayit Degefa.
What's Next

As the event approaches, expect discussions around new contenders rising among the ranks and the potential for breaking records, especially without the previous champions in the field.

Bottom Line

The 2026 Bolder Boulder promises an exciting competition with fresh faces leading U.S. teams, ensuring a dynamic race atmosphere and the potential for new records.