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ST. LOUIS - Running a marathon is the achievement of a lifetime for many people, but what about comleting what are known as the six major marathons?

St. Louisan Teri Griege has done it: Boston, London, Berlin, Chicago, New York, and most recently Tokyo.

Not only that, Griege is a world-class triathlon champion who continues to train while living with stage 4 colon cancer.

Griege joined First @ 4 Friday to talk about her experiences. Click the video player above to listen to the interview.

You can follow Griege through her website.

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