Scown was born in Hāwera in 1983.[7]Sonia Waddell (née Scown), a fellow competitive rower, is her cousin. Her uncle Alistair Scown (Waddell's father) is a former All Black.[8] She completed her schooling at Wanganui Collegiate School. She participated in a number of extra-curricular activities during her schooling years, most notably rowing which she took up during her final years at Wanganui Collegiate School. Her teachers saw potential in her and allowed Scown to participate in the New Zealand Secondary Schools Rowing Regatta for Collegiate.
During her summer holidays, Scown would go home to Wanganui and compete in the Rowing New Zealand Summer season. In 2005, which was her final year at University, she received a Rowing New Zealand trial and was named a member of the New Zealand Under-23 Women's quad scull with fellow members Bess Halley, Darnelle Timbs, and Clementine Marshall.[10] Scown and her crew mates competed at the Under-23 World Championships in Amsterdam and won a bronze medal.[11]
A year later, Scown competed at the 2007 World Rowing Championships in Munich, Germany as part of the New Zealand Women's Rowing Eight.[13] However, once again, Scown and her crew returned home empty-handed as they came in 9th.
2009 provided the opportunity for her to secure a seat in the New Zealand Women's Pair.[14] Scown was named in the boat with fellow eight-rower Emma Feathery and the pair competed at two World Rowing Cup events, winning both world cups and becoming World Rowing Cup leaders for their event in 2009.[15] They went on to compete in the 2009 World Rowing Championships in Poznań, Poland, and found themselves in one of the closest races of the regatta; there was only 1 second within the first three crews in the race and Scown and Feathery came in third, winning the bronze.[16][17]
In 2010, Juliette Haigh who was in the New Zealand Women's Pair from 2004 to 2008 returned to the event and partnered with Scown in the boat. The pair competed at two World Rowing Cup events and convincingly won both finals and the World Rowing Cup leadership jerseys, making them favourites for the 2010 World Rowing Championships to be held at Lake Karapiro in November 2010.[18][19][20] She won a silver medal at the 2015 World Rowing Championships with the women's eight, qualifying the boat for the 2016 Olympics.[21] She also competed in the coxless pair in Rio and with Genevieve Behrent won silver, beaten by the reigning Olympic champions Heather Stanning and Helen Glover of Great Britain.[22] Behrent announced in November 2016 that she would take a break in 2017, hence Scown will need a new rowing partner.[23] Scown rowed with the women's eight in 2017 and won a bronze medal at the 2017 World Rowing Championships in Sarasota, Florida.[24] Scown will take the 2017/18 rowing season off, and will review her involvement in rowing during that time.[25]