At Windham, Ciera Berthiaume converted her own rebound in overtime to lift No. 1 Windham by No. 4 Thornton Academy in a West Class A semifinal.
Windham, now 15-0-1, rallied from a two-goal deficit, and will host No. 2 Scarborough (14-1-1), in the regional final on Wednesday.
Thornton Academy of Saco finished with a 13-3 record.