Surfers, dressed in protective jump suits, knee-pads and helmets, can reach speeds of up to 80 km/h (50mph) on their specially-constructed plywood boards.
Phillip Southan, owner and manager of Bigfoot Hostel and Green Pathways Tours, said the unique trip is a world first.
'We started offering this trip on 2005 and its has become so popular,' the 26-year-old from Barbados said. 'This is a unique tour as nowhere else in the world can you board down an active volcano.
'This is the fourth year and to date we have taken over 10,000 people on this tour,' said Mr Southan. 'It is a 45 minute hike of easy to moderate difficulty.
Cerro Negro last erupted in 1999, and the crater is still smoking. Link -via Unique Daily