Trail Orienteering (Trail O) can be enjoyed by all, including those with disabilities. It does not require speed, strength or navigation but retains the crucial orienteering skill of relating the map to the ground in complex terrain.
Trail O completely eliminates the element of speed over the ground, but makes the map-interpretation element much harder. Depending on the level of difficulty, up to five control markers are hung at each site and only one will correspond exactly with the control description and control circle position. Indeed, (in the elite class only), one possible answer is 'None of the controls corresponds'. Sites are chosen so that they can be seen from a wheelchair-navigable path or area, but they may be quite a distance into the forest or non-navigable terrain.
The only special equipment needed is a compass. An escort can give the competitor physical help - pushing a chair, holding the orienteering map and compass, even marking the control card with the decision according to the competitor's instructions. However, it is an important rule that escorts must not help in the decision-making process; they can give as much physical help as may be necessary, but must not offer advice or opinions to the competitor. For serious competitions, escorts are 'swapped' so they do not know the competitor they are helping.
Trail O has its own World Championships and in 2006 Great Britain took Gold Medal with an excellent performance by Dave Gittus.