Latimer began skiing at Craigleith Ski Club near Collingwood, Ont. at the age of two. She was born with a congenital amputation of her right arm below the elbow and while her sister and cousins were already out on the slopes, Latimer was anxious to join them. She advanced quickly through ski school and started ski racing in the Nancy Greene Development League at age seven. Until joining the Canadian Para-Alpine Ski Team, Latimer raced in the able-bodied program at Craigleith. Latimer competed in the 2014 Sochi Paralympic Games, racking up top-10 in four categories: super combined, slalom, giant slalom, and downhill. As well, during World Cup Finals in the 2015-16 season, she consistently place top-ten in all disciplines.
Erin Latimer produced a breakthrough season in 2016-17, collecting six medals on the Para alpine World Cup circuit. They were her first international medals of her career. She launched the season with bronze medals in both giant slalom races at the opening World Cup in Kuhtai, Austria in December 2016.
A week later she added two more bronze medals at the second stop in St. Moritz, Switzerland and a third in the super combined at the third stop at Innerkrems, Austria in January 2017. Her best international result was a silver in the GS at the fourth stop in Slovenia just before the world championships in Tarvisio, Italy in January 2017. Latimer finished the World Cup season ranked third overall in both the GS and super combined.