Advent calendar day 21

This runner was one of the true pioneers in the sport of orienteering. With five individual victories in the Nordic orienteering championships, one individual victory at EOC and two individual victories at WOC, this runner is one of the big names in the history. If you add eight consecutive wins in the elite class at O-ringen, a bunch of medals in the national championships and a successful relay career, you get a true legend. I want the last name of this pioneer queen of orienteering!