Mia Kilburg-Manganello won her second gold medal on day two of the inaugural International Skating Union Four Continents Speed Skating Championships in Milwaukee.
The American triumphed on home ice in the women's mass start at Pettit National Ice Center to add to her 3,000 metres title from yesterday.
Canada's Lindsey Kent attacked with three laps to go but it was Kilburg-Manganello, an Olympic bronze medallist in the team pursuit at Pyeongchang 2018, who came out on top after a tactical battle.
Olympic mass start silver medallist Kim Bo-reum of South Korea won silver and her compatriot Park Ji-woo took bronze.
Kent had to settle for fifth place.
"That kind of stretched things out and allowed me to open my legs up a little bit," Kilburg-Manganello said.
"The Korean [Park] came around and jumped both the Canadian and myself, which worked out perfectly because I did not want to take the lead just yet.
"I followed her around, and out of the last corner I was able to come around."
Only athletes from outside of Europe are eligible to compete at Four Continents skating events.
It was a golden day for the United States in the women's races as Brianna Bocox claimed the 1,500m title.
She clocked 1min 57.17sec to win after a difficult few months which included the loss of her grandmother and a non-fatal heart attack for her coach.
Nadezhda Morozova of Kazakhstan won her second silver medal of the event in 1:57.89 after she was also second in the 3,000m.
Park ended the day with two individual medals, taking bronze in 1:58.44.
South Korea won both men's events, with Kim Min-seok taking home the 1,500m title.
The Olympic bronze medallist over the distance ended in 1:44.57.
Jess Neufeld of Canada collected silver in 1:45.99 and his team-mate Jake Weidemann managed bronze in 1:46.50.
"It was not a bad race," Kim said.
"I'm in good condition, but not a hundred per cent because of the time difference between Korea and the USA.
"I arrived in Milwaukee only six days ago."
Um Cheon-ho won the men's mass start, leading a 1-2 for his nation in front of Chung Jae-Won.
American Ian Quinn won home bronze.
The event finishes tomorrow with the men's and women's 1,000m events, and the two team pursuits.
A Four Continents event in figure skating has been held since 1999 but the concept has been expanded into both short track and speed skating for 2019-2020.