Two planes and 40 State Emergency Service volunteers are searching for a 21-year-old Bayswater man missing in the Beverley area since 3am yesterday.
Robert Fairchild was at an organised event on Yarra Road about 7km from Brookton Highway in Flynn.
He wast last seen leaving the event and walking int bush.
Mr Fairchild is 165cm tall, with a slim build and brown/reddish curly hair.
He was last seen wearing a white t-shirt and shorts.
Police are concerned for his safety because of the length of time he has been missing and that he has not contacted friends.
Anyone with information should call police on 131444.