The 2018 BOOST National was held from December 11 to 16 at the in Conception Bay South, Newfoundland and Labrador. This will be the fourth Grand Slam and second major of the 2018–19 curling season. The first all-Scottish Grand Slam final saw Ross Paterson of Glasgow beat defending champions Bruce Mouat of Edinburgh 4–3 in an extra end to win his team's first Grand Slam. Rachel Homan beat Kerri Einarson 4–1 in the women's final, to win her ninth slam.