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Canada’s Summer McIntosh set a new U.S. Open record in the women’s 400-meter freestyle Thursday night at the Toyota U.S. Open Championships.
McIntosh, a three-time Olympic champion, finished first in three minutes and 55.37 seconds.
She was more than 15 seconds ahead of her closest competitor, American Anna Peplowski, who took second in 4:10.55. American Emma Weyant was third in 4:11.25.
American Katie Ledecky set the previous US Open mark of 3:56.81 last April in Fort Lauderdale, Florida.
Toronto’s McIntosh was just over a second shy of her world record of 3:54.18 set last June in Victoria.
The competition continues until Saturday.
