Katanning police are searching for 24-year-old Mario Alesio Porru who has not been seen since he arrived in Queerarrup Lake last month.
The missing man has not been heard from since he arrived at the lake in Kenmare, located about 30km south-east of Wagin, on May 31.
His white Suzuki Carry van has been located by police at the lake.
Mr Porru is described as having a fair complexion, with brown hair.
There have been no sightings of Mr Porru and police hold concerns for his welfare.
Anyone with any information about Mr Porru is urged to contact police immediately on 131 444.
