Charteris said the father of two had left a hole in the trail running community and participants left the race course "full of emotion" on Saturday in memory of Neary.
"Steve was a true adventurer - if ever there was something going on he was always in amongst it or leading it," he said.
"He was a pillar of the trail running community and genuinely gave back.
"Everyone ran their hearts out and a lot of raw feelings and emotions were left out there on the race course."
Neary was the first person to complete New Zealand's gruelling Double Hillary Trail, solo and unsupported - a run of 153.5km with 7269m of elevation gain - an achievement Charteris celebrated.
"Steve really led the way in many respects. He was a pioneer in the sport," he said.
"But he was also incredibly modest - others may have been shouting about something like that from the rooftops but not Steve."
Chris Ord, the editor and publisher of Trail Runner magazine added: "He wasn't just a leading light of the trail running scene, he was part of the fabric. He appeared at events, always energetic, always smiling with a big beaming presence.
"His spirit will remain in the NZ trail running scene."
Hot Water Beach was the finish line for competitors on Saturday and cups of special craft beer - a favourite of Neary's, were raised in his honour by many of the finishers.
"That beer at the finish line was for Steve," said Charteris.
"It was a very special moment raising the glass to him. I will remember Steve as a kind and selfless guy. He was an outstanding athlete and we all miss him dearly."