So what is Adventure Racing, or AR to it’s friends? Wikipedia’s entry on AR is complex and best if you read that at your leisure, not all of it would I agree with. In my mind AR is a multi-discipline (at least two) endurance event, involving navigation and tactics.
Disciplines most commonly are running or trekking, cycling and paddling.
The Haglofs Open5 events, run and organised by James Thurlow’s OpenAdventure, are a classic example of a sprint scoring event, involving a run and a cycling phase, all “off-road”. To succeed a good deal of navigation skills are required as well as the obvious endurance and individual discipline competencies.