Brigid Kosgei, a three-time Chicago Marathon runner, returns with a Tokyo course record. The Kenyan runner set a world record in Chicago in 2019. She aims for a third Chicago title, with a personal best of 2:14:04.

Kosgei, 32, has never finished lower than second in Chicago. Her 2019 Chicago run set a world record, which stood for nearly four years. She recently broke the Tokyo course record, running 2:14:29. Read more racing coverage.

Kosgei's fastest half-marathon is 1:04:28, though it was not record-eligible. She grew up in Kenya, running long distances to school. She began training with her husband, Mathew Kosgei, and won her first marathon in 2015. Related: Kiplimo Set to Defend Chicago Marathon Title.

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