Sam Hill, is an Australian professional enduro mountain biker and former professional downhill racer. He was two time consecutive UCI World Downhill Champion during years 2006–2007 for Iron Horse racing team. He won the 2010 world championships in Mont Saint Anne, riding for the Monster Energy Specialized team on a Specialized Demo 8 II. He also won the 2007 and 2009 UCI Elite Men's Downhill World Cup (Overall). In December 2012 it was announced that Hill had signed for the Chain Reaction Cycles/Nukeproof team. As of 2016, Hill has switched to racing enduro and won the 2017 Enduro World Series overall title. In the same year he raced the Downhill World Championships in Cairns, Australia on his enduro bike where he finished sixth.

Mountain biking is a sport of riding bicycles off-road, often over rough terrain, usually using specially designed mountain bikes. Mountain bikes share similarities with other bikes but incorporate features designed to enhance durability and performance in rough terrain, such as air or coil-sprung shocks used as suspension, larger and wider wheels and tires, stronger frame materials, and mechanically or hydraulically actuated disc brakes. Mountain biking can generally be broken down into distinct categories: cross country, trail, all mountain, enduro, downhill and freeride.