Almost 7000 cyclists took to Stage 4 of the Tour Down Under (TDU) before the main peloton on January 25 in South Australia. The TDU is Australia’s premier cycling event attracting cyclists like Andy Schleck and Andre Greipel. The BUPA Challenge is a chance for everyday cyclists to ride one stage of the TDU and complete the 127km ride on the same finishing straight as the big men later in the day. For the second year Ultra was used to track all riders at four start locations and intermediate points along the course. A custom web tracker was developed for the organisers and emergency services personnel to track how many riders were between locations and which riders had yet to finish. All Ultra units were equipped with GSM modems and using OutReach, all times were sent instantly to a webserver that fed the web-tracker. Side antennas also made the job that much easier with the unclosed roads.