18th August 2013, Update - 12WRC2014 organisers have announced a limit of one thousand participants for WRC Black Hills, South Dakota. 

"12WRC 2014. On August 16th and 17th, the 12th World Rogaining Championships 2014 will be based in the Black Hills of South Dakota. Several hundred athletes from across the globe will convene in western South Dakota to compete in teams of two or three in pursuit of the World Rogaining Championship title. 

The World’s is a 24-hour long-distance cross-country navigation race for teams traveling on foot by map and compass. The object is to score points by finding checkpoints (orienteering flags) within the allotted time.  Sanctioned by the International Rogaining Federation (www.rogaining.com) in coordination with Orienteering USA (www.orienteeringusa.org), the World’s will be organized by Peak Assurance with course design by Rick Emerson and hosted by the Black Hills Orienteering Club. "

 http://peakassurance.net/12WRC_2014.html