The victory was worth $80,750 to Kostroma's owners, William deBurgh, Robert Sangster and Jack Preston and family. The fractions were 21 3/5, 44 3/5, 1:07 4/5 and 1:31 3/5, which means that Kostroma covered the final eighth of a mile in 12 1/5 while Kikala was trying to pass her in the stretch. Kikala was second, beating Campagnarde by a half-length.
Kostroma, who carried 117 pounds, one less than Campagnarde and Free At Last, the fifth-place finisher in a field of six, was ridden by Kent Desormeaux, who tried her for the first time at Del Mar. Jones liked that Desormeaux had Kostroma close to the lead early, but after telling the jockey not to abuse the mare in pre-race instructions, the trainer was displeased by the number of times Desormeaux hit her through the stretch.
The victory was Kostroma's seventh in 17 starts. Before the Osunitas, her only other American start came in last November's Yellow Ribbon, which was a disaster. A foot injury, caused by a nail puncture during a van ride, had hurt her training, and besides running eighth in the Yellow Ribbon, Kostroma also bled in the race and came down with a stomach infection that, according to Jones, was life-threatening.