Van Horn, who hails from Glendora, N.J., produced a career-best time of 16 minutes, 34.09 seconds on Friday night to claim victory in the invitational division of the 5K at the Penn State National Invitational.
Her clocking easily met the NCAA provisional qualifying mark of 16:42.00 and stood as the nation's best readout in that event as of Monday.
The performance by the graduate of Triton Regional High School resulted in the sixth-fastest 5K time in Lady Vol annals and elevated her to number four on UT's all-time performers list for that event.
Her previous best clocking at that distance was a 17:27.69 outdoor effort in 2006, illustrating how far the former transfer from the University of Richmond has come in just one year under the tutelage of Big Orange Head Coach J.J. Clark.
Van Horn is the second Tennessee female track & field athlete to earn SEC Runner of the Week acclaim and Lady Vol Athlete of the Week distinction this season. Junior Courtney Champion (Lawrenceville, Ga.) also picked up those honors on Jan. 17.