The Cyclo-cross Kalmthout is a cyclo-cross race held in Kalmthout, Belgium. First held in 1991 under the name "Grote prijs industrie Bosduin", this race was a part of the UCI Cyclo-cross World Cup in 1999, 2002 and 2005 till 2010. In the 2011-2012 season, it was replaced by Namen.