High Quality Content by WIKIPEDIA articles! The Chicago Marathon, one of the five World Marathon Majors, has been contested by men and women annually since 1977. Since 1983, it has been held annually in October. The United States has been represented by the most Chicago Marathon winners (eight men and twelve women). After a seventh consecutive win by a Kenyan man in 2009, Kenyan men have won more times (ten) than men representing any other country. The United Kingdom is in third place in total victories (eight), victories by men (five) and victories by women (three). All four of Brazil`s victors have been men, and all three of Portugal`s winners have been women. The next edition of the race will be held in 2011.