Orienteering is a fantastic sport. I've been doing it my entire life.

The orienteers I've known have been some of the brightest and fittest people I've ever met (going to Cambridge, Oxford), doing all sorts of interesting things, and are some of the best runners you can find. One of my closest orienteering friends was disappointed in running sub-2:40 in his first marathon.

And practised by nearly all Western miliary as a military sport for that reason.