Kenya’s Mark Kiptoo, 50, clocked a 2:15:13 marathon on Sunday at the Mainova Frankfurt Marathon. Running the event for the fifth time, he finished 13th overall and broke the 35-year-old age-group record.
South Africa’s Titus Mamabolo held the previous record, running 2:19:29 in Durban in July 1991.
According to the 2025 World Masters Athletics (WMA)/USATF age-grading standards, Kiptoo’s performance ranks at the 99.5th percentile. His 2:15:13 is equivalent to a 2:01:12 marathon at peak age, or an open-class world-standard performance of 2:00:35.
That world-standard equivalent is identical to the time run by former world-record holder Kelvin Kiptum of Kenya at the 2023 Chicago Marathon.
The calculation uses the 2025 age-grading standard for a 50-year-old man. Kiptoo’s performance is therefore not merely an exceptional masters result; it is approximately 41 seconds outside the published age-50 world-standard marathon time.
While Kiptoo’s performance is remarkable, it is hardly unprecedented in his career. He has been running exceptional masters times since turning 40.
In 2019, Kiptoo set the world 40-plus best at the Mainova Frankfurt Marathon. Twelve months earlier, he ran 2:07:50 to finish sixth at the World Athletics Gold Label road race, becoming the first runner aged 40 or older to break 2:08 for the marathon.
Kiptoo made his marathon debut in Frankfurt at age 37, finishing second in 2:06:15, just one second behind the winner. He returned in 2014 to win in 2:06:49. Three of his five fastest marathon performances have come in Frankfurt.
His lifetime best remains 2:06:00, set in Eindhoven, Netherlands, in 2015.
At age 48, Kiptoo also ran 1:00:27 for the half-marathon.
Age-graded performance level of Kiptoo’s time of 2:15:13/2:15:24 at age 50 equates to an open-class world-standard time of exactly 2:00:35.
