Exterra Guam April 4, 2014 Events, Multisports, Triathlon Philippines XTERRA GUAM CHAMPIONSHIP 2014 will be our 10th year as part of the XTERRA family of off road races. It is year number 3 as a full-fledged ‘Championship’ event, complete with a $15,000 pro prize purse and slots to the XTERRA World Championship.