The 2018 Tour Challenge was held from November 6 to 11 at the in Thunder Bay, Ontario. This was the third Grand Slam of the 2018–19 curling season. In the men's Tier 1 competition, Brad Jacobs defeated Brendan Bottcher in the final 6–5. Team Bottcher was playing in their first Grand Slam final. In Tier 2, Kirk Muyres defeated Scott McDonald's team in the final to secure a spot in the 2019 Canadian Open. The women's Tier 1 competition saw Rachel Homan defeat Tracy Fleury 8–4. In the Tier 2 final, Elena Stern beat Sayaka Yoshimura 6–5, qualifying for the 2019 Canadian Open.