Olivia Mehaffey carded a four-over par 76 at Augusta National to finish tied for 23rd in the Augusta National Women's Amateur Championship.
The County Down native ended the 54-hole tournament on five-over, 15 shots behind winner Jennifer Kupcho.
Mehaffey qualified for the final round at the Masters venue having shot one-over through the first 36 holes at the Champions Retreat Club.
The famous course did not allow female members until 2012.
- Augusta National Women's Amateur Championship final leaderboard (external)
- How to follow the Masters on the BBC
21-year-old Mehaffey was level after the front nine, following a bogey on four with a birdie at the next.
Four dropped shots on the back nine saw Mehaffey, who is on a scholarship at Arizona Statue University, slip down the leaderboard.
American Kupcho was part of a thrilling final pairing with Mexico's Maria Fassi but finished strongly with an eagle on the 13th before birdies at 15 and 16.
A birdie at the last sealed a historic four-shot victory for the amateur world number one in the first year of the tournament.
The historic Georgia course will host the first men's major of the year on Thursday.