At Orono, Becky Lopez-Anido recorded a hat trick while Izzy Baker scored the other two goals as No. 1 Orono triumphed.
Morgan Dauk had tied the game at 1 midway through the first half for No. 8 George Stevens of Blue Hill before Lopez-Anido and Baker scored two minutes apart to help the Riots regain control.
Orono improves to 11-1-3 while GSA finishes 11-4-1.