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
U.S. Route 385 Gaines County starting between Seminole and Andrews down to US 90 in Marathon. In Oklahoma, US-385 runs through Cimarron County at the end of the Oklahoma panhandle. Fourteen miles north of the border, it joins with US-56, US-64, and US-412. The three highways run northeast into the county seat, Boise City. In the middle of town, the highways come to a traffic circle surrounding the Cimarron County Courthouse. The traffic circle serves seven highways (with most passing through, forming the state's only six-way concurrency): U.S. Routes 56, 64, 287, 385 and 412, and State Highways 3 and 325. Every numbered