Leah DaCosta (Kingston, ON) is set to play Madeleine Stewart (Barrie, ON) in the Bronze Medal game at the 2025 OFSAA Girls Curling Championship in Sarnia, Ontario, Canada. of the 2025 OFSAA Girls Curling Championship in Sarnia, Ontario, Canada; DaCosta lost 7-2 to Sarah Adair (Nepean, ON) in the semifinals to drop into the third place game. of the 2025 OFSAA Girls Curling Championship in Sarnia, Ontario, Canada; and won 12-1 over Tory Schieck (Palmerston, ON) in the quarterfinals. of the 2025 OFSAA Girls Curling Championship in Sarnia, Ontario, Canada;
 
DaCosta finished 4-0 in the 0-team qualifying round. . In their opening game, DaCosta defeated Sophia Worsley (Etobicoke, ON) 9-3, then won 10-2 against Hayden Cheung (Mississauga, ON) and 5-4 against Deanna Halls (Stratford, ON). DaCosta won 6-4 against Claire Dubinsky (Thunder Bay, ON) in their final qualifying round match.
 
DaCosta ranks th overall on the Year-to-Date rankings with points earned so far this season.