Rally raid, also known as cross-country rallying, is a form of long distance off-road racing that takes place over several days. The length of the event can be as short as 2–3 days for a cross-country baja to as long as 15 days with marathon rallies like the Dakar Rally; with other cross-country rally events lasting 4–5 days. With skill in navigation being key, the driving skill and endurance of riders, drivers, co-drivers, and machines are put to the test. The total distance covered can be anywhere between 600 km to over 5,000 km with terrain ranging from sandy dunes, forest roads, mountain roads, and dry river beds; among others.