O'Donnell's clutch goal 27 seconds into overtime gave Missy Doherty her 100th win as head coach of the Nittany Lions.
Denver is an extremely balanced team with an elite goaltender, solid defense, and plenty of star power up front.
Penn State is currently ranked No. 4 in women's fencing and No. 5 in men's fencing. It joins Notre Dame, Ohio State, and Columbia as the programs ranked inside the top five of the men's and women's divisions.
Prior to re-opening his recruitment, the prospect received offers from more than a dozen other teams, including Butler, Cal, Nevada, San Diego State, and Stanford.
Before coming to Penn State, Hamilton played two seasons of major junior hockey with three different teams following two seasons at Miami (OH).
The Nittany Lions will take on the winner of Louisville-Mississippi State on Tuesday, March 27 at Madison Square Garden.