The snowfields of an Aspen, Colorado ski resort has become the home of Australia’s largest coronavirus cluster.

Pitkin County Public Health confirmed nine Australians tested positive for COVID-19, while one is awaiting results, and three others have refused testing.

The Australians are all aged in their 50s, 60s and 70s and have been placed in isolation in their hotels around Aspen and Snowmass under a state-issued order by the Colorado Department of Public Health and Environment.

The group contacted Colorado authorities of their own volition after an Australian woman - who they had been travelling with - tested positive for COVID-19 after returning home to Australia.

A skier in action with Aspen Highlands' famous bowl in the background. Credit: SNOWMASS PR / PR IMAGE

They were part of a larger group of 24 people, some of whom have returned home to various countries for testing and are in isolation.

It’s understood all thirteen Australians are doing relatively well.

The group must stay in isolation for 14 days and have two negative tests - 24 hours apart - in order to leave their hotel rooms, and return to Australia.

‘Caring without contact’

The Little Nell confirmed it had two guests in isolation with coronavirus in a post on their website.

“The couple is sharing a guest room and have been self-isolating since Sunday, March 8,” the statement said.

Aspen Mountain, left, Aspen Highlands and Buttermilk. File image. Credit: ASPEN SNOWMASS / PR IMAGE

“While they are self-isolating, we are caring for them without physical contact.

“Housekeeping services have been paused.

“In-room dining deliveries are made with disposable containers left for the guests at their door.”

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Aspen Snowmass has also cancelled several events since the outbreak, including the Kick Aspen Big Air, NASTAR National Championships and the US Tech Championships.

“We are following Center for Disease Control COVID-19 protocols in cleaning, food service, handwashing, and by requiring that employees stay home in the event of illness,” it said in a statement.

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The Aspen coronavirus cases