Eastwood played for Team Canada at the 2015 IIHF World Women's U18 Championship, joining a team that included future NWHLers Carly Jackson, Alyson Matteau, and future Toronto Six teammate Sarah-Ève Coutu-Godbout, in addition to future Canadian women's national team players Sarah Potomak and Micah Hart, and many other standout players. The team won silver after falling in the gold medal game to Team USA in overtime.