SA trail runners Christiaan Greyling, AJ Calitz break Guinness World Record on Table Mountain By Supplied Share Cape Town â South African trail runners Christiaan Greyling and AJ Calitz have broken the Guinness World Record for the greatest vertical distance on foot, on Table Mountainâs Platteklip Gorge. The pair beat the previous record of 13 ascents in 24 hours by completing a gruelling 14 ascents in 20 hours, with 19 376m climbed on Monday. Greyling lives in Stellenbosch, and has won the Ultra Trail Cape Town 100, Skyrun 100, Otter trail 42. He also ranks in the top four men in the International Trail Running Association (ITRA) general classification in South Africa and 1st in the XL classification (90-100km with 5000m ascent).