Hehe so you did the 'rondje ringvaart'

But you are correct there isn't much charity rides over here. There are a lot of touring rides and clubs.

Triathlon ... mhhhh ... lemme see.

I googled a bit and found this website (it's in dutch)

National triathlon rides (both pro and just for fun)
http://www.triathlonweb.nl/twn/show....info&ID=183007

International triathlon rides (pro stuff):
http://www.triathlonweb.nl/twn/show.php?chapter=Wedstrijdinfo&ID=183007