Last week, family members travelled from Australia to New Zealand to start a search for Blake.
His older brother Rob Blake and brother-in-law Jamie Costa started searching amid the rough weather on Tuesday.
The pair scaled rough terrain hiking along the train tracks from Mahia up to Gisborne, and had also been travelling around the area by car and on quadbikes looking for Blake.
Earlier today Rob told the Herald about the gruelling search, saying it had been "really draining" but said that he was not giving up until his brother was home.
During the start of the search "the weather was so terrible" but they had pressed on.
A shepherd told the pair he had seen Blake at a railway tunnel on Friday, at a spot not far from the family's search.
"We were less than 2km away in a different tunnel," Rob said.
They had been kicking themselves when they realised how close they had been, he said.
He had said all he wanted was for his brother to come home.