The man had to spend a "very wet and cold night in the bush".
"During the course of today, he's battled his way through that thick, dense bush and managed to emerge over several ridges and make rendezvous with our waiting search team."
He met the team about 3.30pm.
The man was assessed by paramedics who found he had the onset of mild hypothermia.
Watson said different circumstances could have led to a "totally different outcome" for the man.
A team of 14 Search and Rescue volunteers were involved in the search, as well as a police incident management team and search dog.
Watson reminded trampers to find out the weather forecast for several days ahead before heading out, and to talk to locals, information centres, and DOC staff about the area first.
"Be prepared, know your limitations," he said.
He also advised people to take a personal locator beacon with them on tramps.
"We're lucky and thankful we had a speedy conclusion to the search," he said.
-NewstalkZB