The first duck home will bag its owner $1,000, with $500 for second place and $250 for third.
"Obviously Covid-19 has impacted things this year," Goldsworthy said.
"We're still working out how to keep distances down the river, and there won't be the activities for the kids and other little fundraising things.
"Hopefully, it (Covid-19) stays out of Whanganui until Saturday."
Despite the threat of the virus, Goldsworthy said the organisers of the race were determined to make it happen.
Plumber Dan's annual soapbox derby has already been cancelled, something Goldsworthy said was "gutting".
"Jigsaw is awesome. They're a really good team, and we like to support them
"There could be unknowns between now and Saturday that prevent it from happening, but there's only a week to go. We're counting down.
"We live in hope. Without hope, what do we have?"
Tickets for the race are still available at the Plumber Dan and Jigsaw Whanganui offices.
It kicks off at 12.30pm on Saturday.