At the 2010 World Junior Championships in Athletics in Moncton, Balkwill ran a personal best time of 59.04 in the semi-final in order to qualify for the final.

[3] At the 2011 Pan American Junior Athletics Championships in Miramar, Florida, Balkwill finished 4th in the 400m hurdles in a time of 59.21 after a 7-week layoff due to an ankle injury.

[4] She then combined with Annie LeBlanc, Katherine Reid, and Rachel Francois to win silver behind the United States and ahead of the Bahamas in the 4×400 m relay in a time of 3:38.99.

In 2012 as a freshman at the University of Miami she sustained a navicular fracture to her foot, which required surgery and forced her to end her outdoor season prematurely.

2015 was a break out year for Balkwill and she returned to form by successfully making NCAA Championships in Oregon, in the 400m Hurdles with a personal best of 56.80 and helping lead the University of Miami women's 4x400m team to a 6th-place finish earning All-American status in both events.