Registration is open!

For the 4th annual
Half Marathon, 

3-person Half marathon Relay, 7K and 2.1K

March 22, 2015

About the RElay & Run for 21K

On Sunday, March 22, TACKLE 21 KILOMETERS (13.1 MILES) ON YOUR OWN OR AS PART OF A 3-PERSON RELAY TO HELP SUPPORT THREE GREAT CAUSES! New This year: 7K and 2.1K options! 


The Relay and Run for 21 helps to raise money for theDown Syndrome Association of Greater St. Louis, DADS Community Outreach Fund and the Pujols Family Foundation. The 21 represents the third 21st chromosome, and 21 kilometers is the approximate distance for a half marathon. 


The Relay and Run for 21Kcoursestarts in downtown Clayton and winds its way across St Louis County, passing through residential areas in University City, Olivette, Creve Coeur and Maryland Heights. The finish line is located at Westport Plaza in Maryland Heights.

Whether running as an individual or 3-person relay team, the course is somewhat challenging and ever changing along its path. And great finisher medals await at finish line at Westport Plaza. 

The relay will be run in three segments:

  • Segment one is 4.1 miles long and is fairly hilly in the middle.
  • Segment two is 4.35 miles long and is a little tougher with more gradual, but long hills.
  • Segment three is 4.65 miles long and includes the St. Louis version of Heartbreak Hill.  The finishing portion is fairly flat and mostly downhill.  

The 7K will take place as part of the relay. The 2.1K is a race and fun run,


Eight Aid Stations will be located along the course. Buses will continually run from the start line, to each of the 2 relay stations, the finish line and then return again to the start area. Spectators are encouraged to also ride the buses. Please give athletes preference when loading. For more information please see our Race Info Page.