The 19-year-old former Orange High School student was found dead at Mount Canobolas State Forest on Tuesday.

Rally organiser Jayden Smyth, who worked with Mr Graham at Almighty Industries for almost three years, belongs to the Cancer Cruisers group, which runs charity road rides.

He said Sunday's version was dedicated to the Graham family.

"Everyone's been pretty shocked and devastated since we got the news," he said.

"We just want to come together as a group and support everyone who has been affected, especially Lewis' parents."

VIDEO: Sunday's touching tribute gets under way ...

The group left the former Bunning's building on the Mitchell Highway and drove as one to Mount Panorama.

A barbecue at McPhillamy Park on top of the mountain raised money for both the family of his "good mate" and for Beyond Blue.

"We just want people to know that you can talk about your problems, you don't have to keep it bottled up inside," he said.

"It's okay to not be okay."

A GoFundMe page set up for the teen's family on Friday has raised thousands, with Almighty Industries, the truck body builder where Mr Graham was employed as a fabricator, donating $1000 to the page.

The organiser of the fundraising page said they wrote the description with "a heavy heart."

"On Friday of last week we were celebrating the end of another working week with Lewis," they wrote.

"He appeared to be on top of the world and ready for his next adventure with his mates. Sadly this wasn't to be.

"As a community, Lewis' school friends, work colleagues and everyone that ever knew him need to pull together and be there for each other and in particular for Lewis' family, Brett, Trina, Will and Ollie."

The GoFundMe page will donate a portion of funds to headspace, with the aim of preventing further tragedy.