Orienteering is a class of outdoor navigation that involves the athlete running a course marked out by checkpoints on an orienteering map.
Read more here: An Introduction to Orienteering
Watch this video to learn more:
1) Orienteering on the International Scene: https://www.youtube.com/watch?v=8MIoSr2rQpY
2) Running Wild: Orienteering – https://www.youtube.com/watch?v=H3TLmTNOb5E
How Do I get Started?
Read more here –> Getting Started
Sample Orienteering Maps in Singapore: