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80year old grandmother becomes oldest woman to finish Ironman World Championship

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Natalie Grabow, 80, of New Jersey, was the oldest finisher and winner of the 80-84 age group in this year’s Ironman World Championship in Kona on Oct. 11, 2025. (Photo courtesy: Ironman)

When Natalie Grabow grew up in the 1940s and 50s in New Jersey, there were not a lot of opportunities for girls to do sports.

“We were cheerleaders,” Grabow said. “I begged my mother to give me gymnastics lessons, but parents at that time didn’t give you any lessons. We just ran around outside and rode bikes.”

But Grabow always has had a competitive spirit, and that shined through last Saturday when Grabow crossed the finish line on Ali’i Drive.

“You are an Ironman” the announcer said as Grabow, at age 80, became the oldest female ever to finish the Ironman World Championship in Kona.

The previous oldest was Cherie Gruenfeld when she finished the championship race at 78 years old in 2022.

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“I had a good day and I’m just really pleased with myself,” Grabow said Thursday.

The mother of two and grandmother of four said her goal when she entered the water at Kailua Bay a week ago for the swim leg was to complete the grueling 140.6-mile triathlon before the 17-hour cutoff.

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