Orienteering is a sport that combines running and navigating. Most orienteering events take place in forests, though they can be run on any kind of terrain, including open moorland, local parks, sand dunes, and even city streets.
Orienteering usually requires specially produced maps drawn at scales which show a high level of detail.
Wherever it occurs, orienteering usually involves visiting pre-designated places (called Controls) in a particular order. Orienteering involves thinking carefully about your route. Sometimes it will be quickest to go round paths; sometimes the faster route is a more direct one across rougher ground.
The Adur Centre has a number of orienteering courses in Sussex, Surrey and Hampshire. These are a great way to try orienteering out without going to a formal event.