Long rides on hiking and mountain paths have some resemblance to cycle touring but the latter usually take place on tarmac. However, mixed terrain cycle-touring, nicknamed "rough riding" in Canada and the US and "rough stuff" in Europe, is a form of trail riding, because it involves cycling over a variety of surfaces and topography, on a single route, either using a mountain bike or hybrid bike. A new style of travel called adventure cycle-touring or expedition touring involves exploring remote regions of the world on sturdy bicycles carrying lightweight gear. This type of trail riding is in fact a form of backpacking.