Wiklund was born in Nälden on 10 March 1988. She took up sports as a child, playing ice hockey and association football in addition to competing in athletics; she did not start concentrating on the high jump until she was 14. She was a leading age group jumper, clearing 1.86 m in 2004; the jump ranked her fourth on the world youth list that year, and second among athletes born in 1988 or later. In the following years her development stagnated, and she did not improve her personal best again until the 2007 indoor season; she placed fifth at the 2005 World Youth Championships and eighth at the 2006 World Junior Championships. In addition to the high jump, she occasionally competed in the long jump; she won both events at the 2005 Finland-Sweden youth international.