Catherine Elizabeth Sangrey has been reported as an escapee/walkaway from the Great Falls Pre-Release Center.
The GFPRC said on Friday evening that Sangrey went to pick up went to place of work to pick up a paycheck and failed to return to the center as scheduled.
She was last seen wearing a black sweatshirt, with a white T-shirt under the sweatshirt, dark blue jeans, black and white tennis shoes, and with a Batman backpack.
As of Monday, she still has not reported in.
The Montana Correction Offender Network website says that Sangrey was convicted in Cascade County on a charge of criminal possession of dangerous drugs.
Anyone who sees Sangrey or has information about her location is asked to call the GFPRC at 406-727-0944, or the Great Falls Police Department at 406-727-7688.
The GFPRC is located at 1019 15th Street North.
The facility is a operated by private non-profit group contracted by the Montana Department of Corrections and the federal Bureau of Prisons.
They typically house about 240 men and women at a time and all of those residents are required to hold full-time jobs in the community.
Along with work, residents must fulfill any legal obligations such as fines or substance abuse treatment.
Most only stay at the center for about six months before they are allowed to return to life in the community.