A search is on for 36-year-old Timothy Clements of Rangiora, who has not returned after going tramping on Saturday in the Ashburton Lakes area near Mt Hutt.
Police said Mr Clements was dropped off at the start of the track on Double Hill Run Road on Te Aroha Track, heading toward Lake Emily on Saturday, 18 May.
He was due to get picked up at Lake Emily on Monday morning but did not arrive. Police were notified about 4.45pm that day.
Police were searching with the help of two dog handlers, a helicopter, and 25 search and rescue volunteers.
They asked for information from anyone who may have seen Timothy at all, by calling 105, referencing 190522/8605.