The World Trail Orienteering Championships (WTOC) were first held in 2004 and annually since them. The majority of the championships were held in Europe, with 2005 the only exception up to date. The current championship events are: * PreO - the traditional event * TempO - competition consisting of timed controls only (since 2013) * TrailO Relay – for three-person teams (since 2016, replacing the previous team event)