Alta Pierson, from Utah, debuted in track at 100 at the Huntsman Games. She ran the 50m in 1:06.61, setting a Huntsman record. Pierson also competed in three throwing events, winning her age group.

Pierson's 50m time was into a light headwind. She competed against women aged 75 and up in the sprint and 80-and-over in the throws. The Huntsman Games have been held annually since 1987, attracting runners aged 50 and over. Read more everyday miles coverage.

Pierson has two more races scheduled. She will run the 100m and 400m on Wednesday. This event has featured other late-blooming athletes, like Julia Hawkins, who ran until age 105. Related: Kenenisa Bekele Withdraws from Berlin Marathon Due to Injury.

This original Runner World brief is based on reporting from Marathon Handbook. Visit the source for its complete reporting, context and any later corrections.