Bolder Boulder Ranks As 3rd Largest Road Race in America

From Colorado Runner

A study by Running USA ranks the Bolder Boulder 10k as the third largest running event in America. Last year’s event on May 30 had 44,671 officially timed finishers. There’s still time to train if you want to run the 2017 edition next month on Memorial Day!

Check out the top 20 biggest race in the U.S. HERE