Trish Bartholomew represented Grenada in the women's 400 meter run. During the 16 August qualification round, Bartholomew participated in the sixth of seven heats. She completed her event in 52.88 seconds, taking fifth place out of eight athletes. Bartholomew was one millisecond behind Kineke Alexander of St. Vincent and the Grenadines, who ranked fourth; and was 1.36 seconds behind Jamaica's Novelene Williams, who took first in the heat. Bartholomew tied with India's Mandeep Kaur for 33rd place out of 50 athletes. She did not advance to semifinals.