A Dorrigo man is feeling lucky to have escaped the impact of a large boulder that rolled down the side of a steep slope and landed on a winding rainforest road on the New South Wales Mid North Coast on Sunday evening.

Harrison Darley said he was driving home from his girlfriend's house along Waterfall Way between Bellingen and Dorrigo on Sunday night when he came across the boulder.

"I came around the corner and it was probably about 50 metres in front of me," he said.

"As I got closer I realised it was actually bigger than my ute.

"I looked up the side of the bank from where it came down from and it had cleared a massive path."

A photograph of Mr Darley standing beside the rock has been widely shared on social media.

It took up the entire left-hand lane of the roadway.

Mr Darley contacted local council and police, who had the boulder removed in time for Monday morning traffic.

He said having seen the result of a significant rock-fall first hand, he would take extra caution driving along the road in the future.

"My mother wasn't too impressed by the whole thing," he said.

"I'm definitely going to be looking up every time I commute that road now," he said.