Nash was missing over the weekend after she had a car accident in the early hours of Saturday morning.
She was last seen at 5.30am on Saturday morning walking with her dog, Scooter, along the Motueka Valley Highway near Motueka River Lodge, heading towards Motueka.
Nash was found at about 4pm on Sunday afternoon “alive and well” by members of the public.
Police would not say where she was found, but said it was “within the search area”.
A spokeswoman for the search and rescue operation said Nash was found “within the search area” and she would be “assessed” for any health effects from her time spent missing.
On Sunday afternoon, police had increased their search with volunteers, LandSAR, and a team of six searching the Motueka River by jetboat and kayak.
Senior Constable David Cogger said the search of the river was to “cover all bases”.
“The crash site was near the river, it’s a common place for people to take dogs exercising, and it’s only because of that that we’re searching all possibilities at the moment.”
Nash’s car was found driven off the road about 800 metres from where she was seen. The crash did not appear to be serious, and it was unlikely Nash would have been badly injured, Cogger said.
“She’s driven off the road and hit a fence. It’s not a serious crash, you likely could have driven away from it.”
He said the main concerns for Nash’s wellbeing were the length of time she was missing, her age, and the fact that she was alone.
“We’re trying to leave no stone unturned.”
Police search teams spent Saturday and most of Sunday looking for Nash, both along the highway and on tributary roads. The Nelson Bays Search and Rescue group were helping in the search.
Police asked anyone living in the Motueka Valley, including Mitten Heights, to check their property for any sign Nash was there, and asked at the Saturday market if anyone had seen her recently.
Police thanked LandSAR, the NZ RT2 response team, the Jetboat Club, the Swiftwater Rescue Team, and the residents of the Motueka Valley.