In addition to biathlon, Eder has also competed in cross-country skiing, mostly in sprints and other short races. She enjoyed particular success at the Under-23 level, finishing on the podium in the individual sprint at the Under-23 World Championships three times, taking third in the 2008 Championships in Malles Venosta, second in the 2009 event at Praz de Lys-Sommand, and taking the gold medal in 2010 in Hinterzarten. In the FIS Cross-Country World Cup, her best results have been fifth places in the individual sprint in Sochi in February 2013, and in the team sprint in Toblach in January 2017. She competed in the cross-country sprint at the 2014 Winter Olympics in Sochi, where she placed 15th.