Metrication in the United States traditional mile-based lengths. In the Olympics, athletes run 1500 meters, not 1600 meters. Running races in the U.S. are usually run in metric distances (e.g., the 100 metres dash or the 5K run), although the mile distance remains popular. But even 5 and 10 kilometer races most often have mile markers on the course, and no kilometer markers. Long-distance races are often measured in kilometers, although exceptions exist (generally 10 mile races). The marathon is referred to as a 26.219-mile race (the official marathon standard distance originally being in English units — 26 miles, 385 yards) rather than 42.195 km.
2012 Olympic Marathon Course a new women's marathon Olympic record of , clipping 7 seconds off the previous record. The new Olympic record was 7min 42sec slower than Paula Radcliffe's world record set in 2003 during the London Marathon. The winning time of 2:08:01 by Stephen Kiprotich of Uganda in the men's marathon, on 12 August 2012, was outside the Olympic marathon record and outside the world marathon record. The winners of the Paralympic marathon events were: The 2012 Olympic route differed significantly from that of the long-established annual London Marathon. Although the Olympic route shared a finish in The Mall and a section