In Sweden we call it "Orienteering shooting" (Orienteringsskytte). It is more a triathlon than biathlon really, because it consists of three parts: 1) Shooting. If you miss the target you get time penalty or a penalty loop. 2) "Location orienteering", where you run along a taped course. Along the course there are flags and you are supposed to punch a whole in the map with a nail where these are situated. For each millimeter error on the map you get a time penalty. 3) Normal orientering.
This is not a big sport in Sweden. Poorly known even among orienteers and it is not organized by the orienteering federation, but by a military sports federation. But there are international championships.
I did a search on the internet and found a film (in Swedish), introducing the sport:
http://www.mangkampsforbundet.org/oriskytte/oskytt...
I also found international rules in english
http://www.mangkampsforbundet.org/oriskytte/IBOFru...