The fund-raising exercise will head west for the 2019 edition of the event in late September, covering even more territory in a bid to meet its target this year.

Organisers say the $100,000 mark looks set to again be eclipsed by the charity.

The event will support Little Wings, an organisation which helps sick children from rural areas and their families travel to and from medical their treatment in bigger centres.

So far Little Wings has helped nearly 250 families battling with sick children.

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Those families have combined to cover close to 1,900,000 kilometres from over 2000 trips to and from hospitals and a lot of those families are stationed around areas the 2019 Tractor Trek will pass through.

Tractor Trek president Nick Clancey was looking forward to being able to assist Little Wings with the wonderful work the charity does,

"It's our first time through Dubbo ... a lot of Little Wings recipients live out that way," he said.

He said the charity had already raised $85,000 and while the magical $100,000 mark is looming there's no fundraising goal.

The route, which has always changed from year to year and was based out of Molong in 2018, will head out towards Taronga Western Plains Zoo on Friday, with a planned photo shoot with tractors and giraffes before two longer days behind the wheel.

Saturday will take the tractors through Wongarbon, Beni Forest and back to Dubbo Showgrounds for the charity's annual gala dinner.

The trek will then recommence the next day with tractors heading to Guerie, Wongarbon and back to Dubbo again.

Mr Clancy said being the first time the trek has been staged around Dubbo interest from participating tractors was at this stage limited.

But he's hoping as the event draws near more people will get behind the cause.

"We've had a few extra tractors but not a huge amount of support from around Dubbo itself yet," Mr Clancy said.

"It's hard with it being the first time ... hopefully we'll get it on that day."

The 2019 Tractor Trek will be from September 27 to 29 based at Dubbo Showgrounds. The 2018 trek was based at Molong and raised nearly $120,000 after completing three, daily loops around the Cabonne Shire.