The Tigers closed out the 54-hole event with a team score of 1116 in the 21-team field. Longwood captured the team trophy with a 912, outdistancing second place St. John's by 10 strokes.
Harris carried the Towson banner for the second straight round with another 84 to finish with a 54-hole total of 264, one stroke off her collegiate low for a three-round tournament.
"We needed Chelsea to shoot in the low 80's," said Tiger coach Kate Stepanek. "She led the squad today and she did that very well."
Harris tied for 87th in the field of 110 golfers.
Sophomore Carley Stenger was second into the clubhouse for Towson with an 88 that placed her 94th. Her 54-hole total of 271 is her collegiate low.
Freshman Francesca Ruscio carded an 88 too that tied her for 98th. Freshman Victoria Frasco finished in 105th place.
Senior Airielle Dawson, who had to withdraw early in the second round after posting an opening round 81, did not compete due to a recurring injury.
Towson is back on the links again April 2-3 when they compete in the Lady Hoya Invitational hosted by Georgetown.