The Montana Department of Corrections and local law enforcement are searching for April Valarie Henneberry, 25, after she left the Passages Women's Program.
Henneberry is blond with blue eyes, about 5-foot-10-inches tall, and weighs 145 pounds.
According to officials from Alternatives Inc. prerelease center, Henneberry left Passages at about 6:30 a.m. Sunday and did not return as planned.
Henneberry is a native of Billings and was sentenced in December 2007 to 30 months correctional supervision for theft. She has been at Passages since then.
She could face up to a 10-year prison sentence for felony escape, and should not be approached. Information on her whereabouts should be reported to law enforcement immediately.