guide to organised rides in Belgium; also covers the rest of Benelux and France (mainly the north) though not as comprehensively.
Dutch only, but very comprehensive
Real-time rainfall - don't leave home without checking it first!
Because cycling in the mud is a year-round sport (dedicated CX pages in dutch only)
the most international, least competitive and generally bestest mtb club in Belgium
More as and when I remember to update this thread!