orienteering
Concise Oxford English Dictionary © 2008 Oxford University Press:
orienteering/ɔːriənˈtɪərɪŋ/
▶noun a competitive sport in which runners have to find their way across rough country with the aid of a map and compass.
– derivatives
orienteer noun & verb.
orienteer noun & verb.
– origin 1940s: from Swed. orientering.
'orienteering' also found in these Oxford entries:

