Turnbull attended
Shattuck-St. Mary's, where she was a classmate of
Nathan MacKinnon and played on the girls' hockey team. As a junior, she appeared in 52 contests while gaining 60 points (on 30 goals and 30 assists). With the team, won two national championships in two years.
College The 2011–12
Wisconsin Badgers season marked her first with the club. In a match versus the Lindenwood Lady Lions on September 25, 2011, she scored her first career
NCAA goal. She holds various UW records and the NCAA record for shorthanded goals in a season. She was the captain of the Wisconsin Badgers in her junior and senior year and is an NCAA champion. She played for the Badgers for a total of four seasons, identifying herself in her Twitter account as having graduated in 2015.
CWHL Turnbull helped the Calgary Inferno capture their first-ever Clarkson Cup championship in 2016. Contested at Ottawa's
Canadian Tire Centre, she scored twice in an 8–3 victory over
Les Canadiennes de Montreal. She would miss most of the 2017-18 CWHL season training with Team Canada for the Olympics but returned in time for the playoffs. In 2019, Turnbull would win her second Clarkson Cup with Calgary. In May 2019, Turnbull joined the
PWHPA after the collapse of the CWHL. She participated in the
2020 NHL All-Star Game with the Canadian All-Stars.
PWHL Following the launch of the new
Professional Women's Hockey League (PWHL), Turnbull was one of three players (alongside fellow Canadian Olympians Sarah Nurse and Renata Fast) signed within a pre-draft period to
PWHL Toronto. ==International play==