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
Pittsburgh Marathon with a new title sponsor, Dick's Sporting Goods, and renewed interest in the race. The 1988 and 2000 races were USA Olympic Trials for women and men, that were held separately from the regular event although both were held over the same course. Aside from the main marathon event, several races occur during the weekend of the marathon, including a half marathon, two to five person marathon relay, 5k race, and "kids marathon." All races except for the "kids marathon" and 5k utilize the same route and starting time as the marathon. Attendance and popularity of the events has risen