The six-day race is an endurance event to see how far you can run or walk in 144 hours, or six days, on roads, tracks, or trails. Most people are surprised to learn that ultra-distance races have been held for more than 150 years. The six-day race was the most popular ultra-distance race during the late 1800s. The golden age for six-day races began in 1875, thanks to the great American showman, P. T. Barnum, who put on the first race in his Hippodrome,...