At the 2012 Summer Olympics, Baillie and partner Etienne Stott qualified through the heats for the C2 event on 30 July, and subsequently progressed to the semi-final. The semi-final consisted of one run each, with the six best competitors qualifying for the final. Baillie and Stott finished in sixth place, taking the final spot and consequently qualifying for the final. As a result of their sixth-place finish, the slowest qualifying time out of the six remaining competitors, Baillie and Stott ran first in the final, securing a time of 106.41. The time was not beaten, with Baillie and Stott winning the gold medal in front of a 12,000 strong home crowd at the Lee Valley White Water Centre on 2 August. Fellow British boat of David Florence and Richard Hounslow finished second with a time of 106.77. Baillie and Stott's success was described as "unexpected" and a "surprise", with the pair describing winning gold as "mad".