Held in historic St. Charles, Missouri, the MO Cowbell Marathon is a qualifier race for the Boston, New York, and London marathons. This must-experience event passes through historic and unique neighborhoods and offers scenic views of the Missouri River. Thousands of spectators line the streets ringing cowbells to cheer on participants in this fun-filled community tradition.

Over the years, MO’ Cowbell has grown to offer something for everyone, including Marathon, Half-Marathon, 10K, and 5K options.

MO' Cowbell's course is hailed as the fastest and flattest course in the St. Louis region and has been named the Best Road Running Event (13.1 miles or over) by Terrain Magazine for two years in a row!

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