Riding Figor, the Canadian posted a winning time of 35.73sec in what was her horse's first big test following an injury sustained at the end of the winter season.

The 11-year-old gelding exceeded expectations to help Foster get the better of American Alessandra Volpi, who finished in 36.52.

Volpi's compatriot Alex Granato secured bronze despite clocking in at 35.01 as he had amassed four faults.

Foster took home $53,750 (£39,276/€46,492) in prize money for her success.

"I was really aiming for this horse show and next week [in Lexington] as his first time back out at the 1.60m level," Foster said.

"We took our time, and I have to say a huge thank you his veterinarian Eduardo Felix and his groom Caroline Holmberg.

"They did a great job getting him back.

"He’s in awesome form.

"The [jump-off] field was small, but it was mighty tonight.

"There were three riders on very, very fast horses.

"Alex's horse is super, super fast and very competitive, so I had a bit of a sigh of relief when that last jump knocked down!"

Foster's result catapulted her up the overall FEI Jumping World Cup North American League standings, and she now sits second with 29 points, behind only Irishman Conor Swail's 37 points.

Australia's Rowan Willis occupies third place with 20 points.

The fourth stop of the season will see athletes remain in the United States as the circuit heads to Lexington in Kentucky.