annefleur kalvenhaar (10 june 1994 – 23 august 2014) was a dutch cyclist and mountain biker. she won the european cyclo-cross championships in 2013. she began her career at the age of 13. she participated for the first time in a world cup in 2012. in houffalize and la bresse she finished second place in the top 10. she was born in wierden, netherlands.