Started experiment 'can you still become a pro cyclist even if you're in your thirties?' in 2008. Raced for a clubteam in 2009, joined UCI-team AA Drink/Leontien.nl in 2010 and went Flemmish in 2013 with Lotto-Belisol Ladies Team.
Wrote book 'Vrouw&Fiets, handboek voor de fietsende vrouw' together with Nynke de Jong.
Used to be full-time journalist for Dutch tv-show Holland Sport. Writes - besides riding her bike - columns for newspapers and magazines like Trouw, Soigneur, Cycling.be, Rouleur Magazine and her website: http://marijndevries.nl