The family of a man from Woodford are appealing for tourists who've visited La Rocca mountain to get in touch if they recognise Felix Marr.
Mr Marr, who's 64 and from Woodford, set off to climb the La Rocca mountain, near Lake Garda, on Friday 10th August.
He sent a text from the mountain - where police sniffer dogs have found his scent - saying he was on his way back for supper.
But the retired systems analyst never returned.
Italian police and mountain rescue have been searching to no avail, along with local volunteers.
Several family members have flown to Italy to join in the search.
Felix's daughter, Angie Marr, says the area is full of tourists, and she hopes someone will remember seeing her father on the mountain. She says "he's the kind of guy who likes to try things and challenge himself. I can imagine him saying: 'Oh, I'll go and climb that mountain to see how far I can go'".