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Vos has won the Emakumeen Euskal Bira four times, making her the most successful rider in the race's history. She won the event in 2014, 2015, 2016, and 2017, becoming the first rider to win the race four times in a row. Vos's dominance in the Emakumeen Euskal Bira is a testament to her all-around ability as a cyclist, as the race features a variety of terrain and challenges.