Never, I have however taken part in some skiing events a few years back (during my student years), and the long distance bicycle race Trondheim-Oslo once (540 km). But I've never put down the hours of training to really do well. I've tried to maintain an active lifestyle, but running/skiing/biking fast has never become a passion for me. Nowadays I just try to get in 3-5 training sessions a week from a varied menu consisting of football, strength training, running, and (now that winter is coming) skiing.
The longest I've ever run is about 20 km.