Only three of the 13 men and women who started a marathon walking race in Boulder on Friday were still going this morning.
The "
Extra-Mile Endurathon" tests the limits of human endurance by challenging participants to keep moving until the last person can't go one step farther.
The remaining walkers with the Boulder group, which set out at 5 p.m. Friday, have walked about 65 hours with 10-minute rests after each four-mile loop — which wraps around the Boulder Creek Path through downtown and along Pearl Street.
During each 10-minute break, walkers can use the bathroom and grab a snack. But they have not slept in three nights.
To win the top prize of $1,000, the last walker must go an extra mile after the second-to-last person drops out.
The endurathon's genesis is a Stephen King novel called "The Long Walk," in which a post-modern U.S. dictator chooses 100 boys ages 6 to 18 each year to walk from the border of Maine and Canada down the East Coast.
Walkers in the novel must maintain a constant speed of 4 mph or they're executed by soldiers. The winning boy gets a prize of anything he wants for the rest of his life
Boulder is the fifth city worldwide to host an endurathon. Buenos Aires, Berlin, Paris and Tokyo also have hold races, and Las Vegas is hosting a World Championship on Dec. 3, where the last four competitors from each event will compete for $100,000.
The world record for non-stop walking was set at the Buenos Aires event Nov. 30 when two contestants lasted for 102 hours.
To break the world record, the Boulder racers will have to keep moving past 11 p.m. Tuesday.