India, Feb. 20 -- Ladakh Marathon, the world's highest AIMS-certified marathon, will return for its 13th edition on September 10 and will culminate on September 13, the organisers announced on Thursday. One of the most challenging tests of endurance and human capacity in the world, registrations for all six races of the Ladakh Marathon, including the curated Silk Route Ultra (122km) and Khardung La Challenger (72km) ultra races, opened on Thursday and can be applied to through the official website.

Beyond the two ultras, the event will feature the Marathon (42km), Half Marathon (21km), 11.2km Run, and the 5km Run for Fun. "Acclimatisation is compulsory for all runners, with ultra runners required to arrive in Leh at least 10 days before ...