Alberto Salazar Australian Derek Clayton in 1969 in Antwerp, Belgium. However, the course was found on re-measurement to be about 148 meters short of the 42.195 kilometre (26 miles, 385 yards) distance. This is equivalent to about 27 seconds. In 1982 he won his first and only Boston Marathon after the famous "Duel in the Sun" with Dick Beardsley. Salazar won the race in an exciting sprint finish and collapsed at the end before being taken to an emergency room and given six liters of saline solution intravenously because he had not drunk during the race. Salazar ended the year ranked #1
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