Hamilton's junior career involved participating in five straight national junior championships from 2008 to 2012. She won the event in both 2008 and 2011. In 2008, Hamilton played third for the Nina Spatola junior team which finished with a 1–6 (8th) record at the 2008 World Junior Curling Championships. In 2011, Hamilton skipped the team of Tara Peterson, Karlie Koenig and Sophie Brorson to a 5–5 (5th) record at the 2011 World Junior Curling Championships.