Cumbria Police are concerned for the welfare of missing 16-year-old Michiel Megos.
Michiel was last seen on Scotland Road, Carlisle at 6pm on November 16.
Michiel was last seen wearing a black jacket and black Addidas leggings with a white stripes.
It is believed Michiel is travelling by train.
Anyone with information should contact police on 101.
Officers would also like to urge Michiel to contact this number if she sees this appeal.