Eighteen firefighters were called in to fight the blaze, as well as crews from Juken New Zealand (JNL) and Horne Logging.
The manager of the partnership that owns the block, John McKinstry, said he was extremely grateful to all those who helped, especially the fire crew from JNL.
"We have much appreciation for the turnout of people.
"The turnout and support we received was fantastic."
It was believed one of the wire hauler ropes, which was leaning on rocks, may have been the cause of the fire.
As the block was being harvested there was very little damage, he said.
"Luckily it never got up around the hauler because it costs about $2 million to replace.
"We were very lucky the wind didn't come up."
Wairarapa principal rural fire officer Phill Wishnowsky said: "Teams were able to get there in the middle of the night and stop the fire causing millions of dollars' worth of damage."
Forestry crews were normally careful and this kind of fire was quite unusual, Mr Wishnowsky said.
"It's not common but when they do happen they can be very, very troublesome and very, very expensive."
People were advised to be mindful of the changing conditions.
Fire crews were expected to remain on site until today to monitor the situation.
Summer fire restrictions are not yet in place for the Wairarapa rural fire district.
