The 45th annual Bolder Boulder took place on May 26, 2025. Officials said 52,000 runners took part in this year’s race, while 1.5 million runners have crossed the finish line since the race started in 1979.
The 45th annual Bolder Boulder took place on May 26, 2025. Officials said 52,000 runners took part in this year’s race, while 1.5 million runners have crossed the finish line since the race started in 1979.