Huge participation numbers and TV contracts are increasing exposure. As Amelia Boone headed to the starting line at the 2013 Spartan Race
U.S. obstacle course racing championships are getting more hype, sponsors and exposure. The Tough Mudder mud obstacle event series is
There will be four major obstacle racing championship events in the U.S. this fall.
Racing in the mud has become wildly popular in the U.S.
A brief glimpse at the white-hot obstacle-racing craze.