Long-distance running only the placing is of importance. Other less popular variants such as fell running, trail running, mountain running and tower running combine the challenge of distance with a significant incline or change of elevation as part of the course. Multisport races frequently include endurance running. Triathlon, as defined by the International Triathlon Union, may feature running sections ranging from five kilometres (3.1 mi) to the marathon distance (42.195 kilometres, or 26 miles and 385 yards), depending on the race type. The related sport of duathlon is a combination of cycling and distance running. Previous versions of the modern pentathlon incorporated
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