Police are conducting a land and air search for a missing prospector, about 30km north of Collie.
John MacKay, 70, set out with a friend near the Bell Brook/Toorak Roads area in Yourdamung Lake around 5pm on Sunday when they became separated.
Police are currently searching the area along with SES volunteers and personnel from the Department of Biodiversity, Conservation and Attractions.
Two helicopters are also searching for Mr MacKay.
The 70-year-old is described as light skinned, approximately 181cm tall, with a solid build, moustache and white hair
He was last seen wearing dark clothing, a wide brimmed hat and steel capped boots.
Concerns are held for his welfare and anyone who sees him, or has information regarding his whereabouts is asked to contact police on 131 444.
PIC: Google Maps
Digital drivers' licences to be introduced in WA
Mandurah FIFO worker wins $250k
2026 ANZAC Day services across the Peel and Rockingham regions
Mother of 11-year-old boy killed in Mandurah scooter crash found safe and well
Peel charity desperately seeks funds to keep doors open
Australind train service set to resume
Thunder premiership player Traye Bennell hangs up the boots
Works underway to protect 200-year-old 'Big Tree' in Greenfields
Wanted man believed to be in Mandurah area