Police searching for a teenager missing for a year say they are "hoping for the best, but fear the worst".
Officers will be handing out leaflets in Blackpool
Charlene Downes, 14, from Blackpool, Lancashire, has been missing since 1 November last year.
She left home saying she was going to a bar on the North Pier with friends, but has not been seen since.
Detectives will be in the area this weekend handing out leaflets to visitors to the illuminations in the hope of jogging someone's memory.
Charlene, of Buchanan Street, was planning to go to the Carousel bar at the North Pier on the Saturday she went missing.
There have been no confirmed sightings of her since she was seen on that day at the junction of Abingdon Street and the back of Clifton Street.
Her mother, Karen, said Charlene should not be afraid to contact them.
She said: "If anyone knows where she is please, please get in touch and put us out of our misery.
Charlene had contacts in Oldham and the West Midlands
"We couldn't bear another year like this, it's been an unbearable year, the worst year of mine and the family's life, being without our lovely smiling happy daughter Charlene."
Lancashire Police has a team of 30 officers - a similar scale to a murder inquiry - working on the case.
Det Chief Insp Andy Johnson said: "The longer we go without any news, while I hope for the best, I have to fear the worst.
"There is still a possibility that Charlene is alive and well, living her life somewhere other than Blackpool, and I hope that is the case.
"We are still getting information that gives us fresh lines of enquiry which we are following up, but there have been no confirmed sightings of Charlene at all which gives me grave cause for concern."
Enquiries have taken detectives to Oldham and Denton in Greater Manchester and Wolverhampton in the West Midlands - places where Charlene was known to have contacts.
Charlene is white, 5ft 1in tall, slim with straight shoulder-length brown hair and has blue eyes.
When she was last seen, she was wearing a black jumper with a white diamonds pattern, black jeans with golden eagles on the front and black boots.
Anyone with information about Charlene's disappearance, can contact Blackpool Police, or the Missing Persons Helpline.