Police are searching for a tramper overdue in the Ashburton Lakes area.

36-year-old Timothy Clements of Rangiora began a walk on Te Aroha Track on Saturday.

He was due to get picked up at Lake Emily on Monday but did not arrive. 

25 LandSAR volunteers are searching the area, including two dog handlers and a helicopter.

Police would like to hear from anyone who was on the track over the weekend or who may have seen him. Thos who may have information are urged to call Police on 105, referencing 190522/8605.