The Spartans scored late to knock Penn State out of the Big Ten Tournament.
Goals from Aurelia Meijer and Gini Bramley pushed the Nittany Lions past the Terrapins in a second half surge.
Moira Putsch scored with three minutes left to put the Nittany Lions into the Big Ten Championship Game.
Connor Maloney, Robby Sagel, Pierre Reedy, and Ryan Gallagher were all honored by the Big Ten in its postseason awards on Friday.
Penn State peppered the Niagara goal with shots on the way to a win in the first meeting of this two-game series.
Gini Bramley's two goals helped the Nittany Lions take the Big Ten Quarterfinal win over the Hoosiers.