Athletics at the 1908 Summer Olympics – Men's marathon Alexandra the next day awarded him a gold or silver-gilt cup in recognition of his achievement. Pietri and Hayes both turned professional and there were several re-matches over the distance of 26 miles 385 yards. Many other marathons adopted that distance, including the important Polytechnic Marathon. The IAAF minutes are reportedly silent as to the reason the 26 miles 385 yards (42.195 km) was chosen in 1921, so any conclusion must be speculative, but regardless of any possible emotional attachment to the distance of the "race of the century", the London 1908 distance had established itself worldwide by that time.
Bangkok Marathon course passes many historical landmarks of cultural and ethnic importance. The marathon starts and finishes in front of The Royal Grand Palace at Sanam Chai Road. The race course is sanctioned by The Association of International Marathons and Distance Races (AIMS) and the Amateur Athletic Association of Thailand (IAAF Rules). In 2013, the course of the half marathon was changed at the last minute because of concurrent Bangkok street protests which reduced the distance of the half marathon from 21.1 km (13.1 miles) to 19.7 km (12.2 miles). In 2015, the half marathon was accidentally extended from 21.1 km (13.1