roads or off-road on a variety of surfaces, from wide forest roads to narrow, muddy woodland tracks. Extreme trail riding, such as Megavalanche are mountainbike downhill marathon style events combining gravity-assisted sections with those that emphasize the riders' levels of fitness, endurance, and nerve. See also Enduro (mountain biking) List of mountain bike areas and trails in the United Kingdom Mountain biking in Australia Single track (mountain biking) Trail bike Pleasure riding References Cycling Individual sports Mountain biking