Differences with more traditional orienteering events include a greater distance to be covered and a larger height to be gained during the course. Distances between controls are significantly greater and there is often a larger element of route choice between the controls with less emphasis on fine navigation near the control site. A long O event requires a much larger area of territory and this means that those who are accustomed to the accurate fine detail of a specially prepared orienteering map must be prepared to make adjustments for the type of map used at a long O event. There are always several courses on offer. At the other end of the scale, the D class will do about 20km or so over the two days and is more suitable for those wanting a shorter distance or for those who are new to the sport.
Most people take part as individuals but it is possible to enter as a pair.
There are age limits for the event and these are explained on the entry form and on the web pages for this year's event. Overnight accommodation is the competitor's own responsibility and is not included in the entry fees.