Reinier Groenendaal (Sint-Michielsgestel, 24 April 1951) is a former professional Dutch cyclo-crosser, whose career lasted from 1978 to 1992.
He won the Dutch National Cyclo-cross Championship in 1985 (beating archrival Hennie Stamsnijder on a frozen, snowy track in Gieten[1][2]), and in 1984 and 1985, finished second and third, respectively, in the Superprestige competition.
He is the father of former cyclo-crosser and world champion Richard Groenendaal.
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