Police are appealing for information to help trace Carl Warr, who has been reported missing from the Farnley area.
Carl, aged 59, was last seen in Farnley at 9:30am on Monday, 20 June.
He is 6ft tall, bald, of stocky build with a grey full beard. He was last seen carrying a backpack containing camping equipment.
Carl is known for going camping alone on Otley Chevin and in Cumbria but his family say it is highly unusual for nobody to have heard from him for such a long period of time as he usually contacts his family when away camping.
Anyone who recognises Carl or knows of his whereabouts is asked to contact West Yorkshire Police by calling 101, or go online quoting log number 922 of 24/6.