The historic event was held in honour of HM King Bhumibol Adulyadej’s 88th birthday on December 5.
The cyclists rolled off from Phuket Provincial Hall at 3pm, proceeded to Chalong Circle then returned to Provincial Hall, stopping off at Wat Chalong for a rest break en route.
At the famous temple, Gov Chamroen led the mass planting of 88 cassia trees in honour of His Majesty.
“The cassia tree is a symbol of our nation and 88 represents His Majesty’s birthday – and all this is for our beloved King,” Gov Chamroen said.
As the bikers rode through Saphan Hin on the return leg, more than 20,000 supporters lined the roadside, with locals Thais and tourists together cheering them on and waving yellow royal flags.
The cyclists arrived safely at Phuket Provincial Hall at about 6pm.