Kenyan veteran Mark Kiptoo has rewritten the masters record books after smashing the M50 world record at the Rural Kutxa San Sebastián Half Marathon in Spain on Sunday, 4 October.Kiptoo, 50, clocked 1:03:54 to obliterate the previous M50 world record of 1:06:23 held by Tanzania’s Titus Mamabolo.Download our Mozzart Sport App for more newsThe Kenyan had arrived in San Sebastián with the specific goal of attacking the record after being handed bib number one for the fifth edition of the race.##NAJAVA_MECA_9999945##Kiptoo delivered emphatically, taking more than two minutes off the previous mark in a stunning display of longevity and speed.The performance is another remarkable chapter in a career that has seen Kiptoo compete at the highest level of distance running.Jepkosgei sets course record as Kenya secures double victory in Cardiff Half MarathonHe had already demonstrated his exceptional form earlier this year when, at 49, he won the Azkoitia-Azpeitia Half Marathon in 1:03:17.The San Sebastián Half Marathon is a certified 21.097km course recognised by the Royal Spanish Athletics Federation, meaning performances achieved on the course are officially recognised.Kenyan athletes reign supreme in Kuala Lumpur MarathonThe 2026 race attracted more than 5,000 runners from 61 countries.Kiptoo’s achievement is particularly impressive given that he turned 50 in June, making him eligible for the M50 category and setting the stage for his record attempt.