2012 Olympic Marathon Course standard length for a marathon, and the 1908 marathon course was originally to have been 25 miles, passing through Uxbridge, Ruislip, Harrow-on-the-Hill before ending at the White City Stadium. It was extended to 26 miles and 385 yards (42.195 km) to avoid troublesome cobbles and tram lines, because of access restrictions at Windsor Castle and to improve visibility to the spectators, including Queen Alexandra, for the finishing stretch inside the stadium. This distance subsequently became the official length of the marathon. In 1948, London hosted the first Olympic Games to be held after World War II the "austerity games". The
2012 Olympic Marathon Course along the Victoria Embankment with the regular London Marathon course, the Olympic event also started in The Mall whilst the London Marathon starts in Greenwich, and the event followed an otherwise different course. The logistical problems behind the design of the London Marathon course (35,000 runners of mixed ability) are very different from those behind the design of the London Olympic Marathon course (100 top-class runners) hence the difference in the routes. The course for the Paralympic Marathon also had four laps which were nearly identical to the 2012 Olympic Marathon course, but avoided certain cobbled areas notably Paternoster Square,