「國際雷利山頭霸王越野馬拉松」(「山頭霸王」)為國際雷利計劃(香港)一年一度舉辦的兩日一夜慈善越野馬拉松競賽。參賽者須組成二至四人的隊伍,完成約25-60公里之賽程(賽程取決於所屬之組別)。參賽者須互相合作,在檢查站取得下站的座標,設計最合適之路線完成賽程。參賽者並須於大會指定之地方露營。 Raleigh International Mountain Marathon (RIMM), an over night mountaineering competition, is an annual fundraising event organized by Raleigh International Hong Kong. Participants, in teams of 2 to 4, have to compete in courses ranging from 25 to 60 km. They will design their own routes to reach the Finish, based on the grid reference information to be acquired from each checkpoint and to camp at a designated campsite overnight.