Mark Barr was one of the standout performers as the United States won 21 medals at the Paratriathlon American Championships ©Getty Images

The United States were in fine form on home soil as they won a total of 21 medals at the Paratriathlon American Championships in Sarasota.

On a course featuring a 750 metre swim, a 18.3 kilometre bike and a 5km run in the Nathan Benderson Park, perhaps the stand-out performance came from Mark Barr, who won the men's PTS2 division by almost six minutes in front of his nearest rival.

He finished in 1 hour, 8min 53sec, leading a US clean sweep that also included Allan Armstrong who finished in 1:14:49 and Adam Popp, who crossed the line in 1:18:03.

In the women's PTS2 division the US dominated once again as Halley Danz and Melissa Stockwell grabbed gold and silver respectively.

Danz crossed the line in 1:21.55, with Stockwell finishing just over three minutes behind in 1:24:59.

In the men's PTS4 class Eric McElvenny took the win in what was his first-ever elite international race, crossing the line in 1:04:36, while the US had another clean sweep in the women's PTS4 division, where Kelly Elmlinger won.

She finished in 1:19.15 ahead of Nicole Ver Kuilen in 1:24:03 and Kelly Worrell in 1:30:21.

In the men's event McElvenny finished ahead of Brazil's Jorge Luis Fonseca who completed the course in 1:06:23, with another US athlete in Jamie Brown clocking in at 1:30:21 for bronze.

Yet another US clean sweep came in the men's PTV1 division where Aaron Scheidies took gold in 1:01:13 over Kylie Coon and Drad Snyder, while Joshua Sweeney put in a noteworthy performance to take gold in the men's PTWC category.

Sweeney is a Sochi 2014 Paralympic champion in Para-ice hockey and was making his triathlon debut in Sarasota.