Marathon world record progression races were first held in 1896, but the distance was not standardized by the International Association of Athletics Federations (IAAF) until 1921. The actual distance for pre-1921 races frequently varied slightly from the present figure of 42.195 km (26 miles 385 yards). In qualifying races for the 1896 Summer Olympics, Greek runners Charilaos Vasilakos (3:18:00) and Ioannis Lavrentis (3:11:27) won the first two modern marathons. On April 10, 1896, Spiridon Louis of Greece won the first Olympic marathon in Athens, Greece in a time of 2:58:50; however, the distance for the event was reported to be only 40,000 meters. Three
Walt Disney World Marathon because of USA Track & Field lightning policy, anticipated lightning and a lack of necessary shelter on course should it be required during the race. All registered half marathon runners received their half marathon medals. In November 2012, Glass Slipper Concierge travel specialist and avid runner Megan Biller began publishing a yearly "Runner's Guide to Walt Disney World" entitled "Magical Miles" through runWDW, LLC, "offering advice on resorts, restaurants, race registration, packing tips, spectator information, training, race day information and much more." In January 2016, Matthew Dobson, the first American male to win the Marathon, self-published a book titled "How