The Lions' (7-6) lone goal was scored by Rebecca Pope in the 49th minute, her first of the season.
Seven saves by goalkeeper Katie Dempsey and first-half scores by Meghan Fahey and Jennifer Trieschman gave the Lions a shutout win over Penn to officially kick off Homecoming weekend.
The Lions will kick off of Homecoming festivities when they host Penn in their spirit game Friday before getting their fourth crack at a ranked opponent when No. 8 Delaware visits Sunday.
Columbia Athletics invites all alumni, friends and family members to campus this weekend as Columbia University will host its annual 2017 Homecoming weekend.
The Lions (6-5) scored four times in a span of nine minutes to take a three-goal lead into the locker room and never looked back.
Princeton's Mary Kate Neff scored twice in 24 seconds in the second half to help the No. 14 Tigers earn a 3-0 victory over the Lions.
Winners of five of their last six, the Lions head to No. 14 Princeton Friday night before hosting Holy Cross Sunday. Both games will be broadcast on the Ivy League Network.
Dempsey becomes the second Lion to earn the honor after a 14-save performance in a win at Cornell Saturday.
The Lions improved to 2-0 in Ivy League play with win over Bears.
The Lions continue Ivy League play with a Saturday matinee against the Big Red.
The Lions (4-4) overcame a two-goal deficit in the second half, thanks to goals from Maeve Doherty and Jennifer Trieschman, but saw its four-game winning streak snapped.
The Lions pushed their win streak to four games after topping the Bears, 4-0. Maeve Doherty netted two goals and Michelle Thompson tallied a goal and two assists.