Eve L'Abbe scored the first goal just five minutes into the contest.
Jordan Pellerin added a goal when she hit the ball of her head into the net just eight minutes after the first Black Bears goal.
Maggie Malone set up the goal off a corner kick.
Laura Swant and Claudia Dube-Trempe combined for the shutout in goal for the Black Bears.
Maine (9-5-4) will travel to Stony Brook for a semifinal contest on Sunday, November 3rd at 2 p.m.
Stony Brook defeated the Black Bears 2-1 in double overtime in the regular season finale last weekend.