The 22-year-old triumphed in the 1,000 metres at Pettit National Ice Center and then helped the Americans to victory in the women's team pursuit.

Bocox also won the 1,500m title yesterday so ended the event with three gold medals.

She clocked 1:15.53 to win the 1,000m after squaring off with South Korea's 500m champion Kim Min Sun in the final pairing.

"I felt a little sloppy, but you can't be too disappointed when you walk away with a personal best," Bocox said.

"We're in the United States so the crowd is big and they're cheering loud. 

"That helps out a lot."

Rio Yamada of Japan won silver in 1:16.02 and bounced back after falling in the 500m.

American Mia Kilburg-Manganello continued her superb event with bronze, clocking 1:16.04 to add to her titles in the 3,000m and mass start.

She was also part of the victorious team pursuit line-up so ended the event with three golds and a bronze.

Paige Schwartzburg was the third team member with the Americans ending in 3:02.55.

This was a big victory over silver medallists Canada, who clocked 3:08.60, while China ended in 3:14.15 for bronze.

Only athletes from outside of Europe are eligible to compete at Four Continents skating events.

There was a dramatic win for Japan's Kouki Kubo in the men's 1,000m as he pipped Canada's Laurent Dubreuil by just 0.002 seconds.

The junior world champion over 500m ended in 1:08.544 with Dubreuil only slightly adrift on 1:08.546.

Kubo's American race partner Kimani Griffin was disqualified at the crossover after being forced to give way to his rival.

"I knew it was going to be a difficult crossing, but I knew I was faster," Kubo said. 

"I had a similar situation at the World Cup in Nagano and because of that I could handle it better here."

There was drama in the men's team pursuit after the US clocked the fastest time but were then disqualified for a safety equipment failure.

It meant Canada's Hayden Mayeur, Kaleb Muller and Jake Weidemann won gold despite their time of 3:44.36 being more than two seconds slower than the Americans.

South Korea won silver in 3:47.620 and Kazakhstan bagged bronze in 3:47.904.

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.