As a junior curler, Winkelhausen played in the 2008 and 2009 World Junior Curling Championships. In 2008, she was the third on the Swiss team, skipped by Michèle Jäggi that finished in 6th place. And the 2009 World Juniors, Winkelhausen threw fourth stones for the Swiss team that was skipped my Martina Baumann. That team would win a bronze medal at the event.