A man is in a critical condition after crashing during the GranFondo cycle race from Vancouver to Whistler Saturday.

The incident happened at 9:54 a.m. PT on the Sea to Sky Highway, five kilometres north of Squamish, just past Alice Lake.

BC Ambulance confirmed the man was airlifted to Vancouver General Hospital.

Kevin Thomson, President of GranFondo Canada, said it's not yet clear what happened.

"We have only third-hand reports that this individual was just riding and all of a sudden they were down, and a solo rider. No other riders were affected," he said.

The cyclist's identity has not been released but he is believed to be in his 60s.

This is not the first time time a cyclist has been hospitalized during the GranFondo.

In 2010, cyclist John Botelho was left with serious brain injuries when he swerved to avoid a water bottle, hit debris in the road, blew out his tires and lost control.

Around 4,000 cyclists were expected to take part in the fourth annual GranFondo race this year.

The 122 kilometre ride takes most riders somewhere between 3½ to 8 hours to complete.