Kgalagadi Desert Classic Riverbed Cycle Challenge is due to take place from 21 - 25 September 2013 from Union's End, 155km down the riverbed to Nossob. Only 50 entrants allowed. More of a tour than a race. 5 x 10 groups with a ranger and a rifle. http://www.sanparks.org/parks/kgalagadi/all.php