Webin helena, montana, the lewis and clark county detention center provides an inmate list or jail roster that allows the public to conduct inmate searches. This article will explain. Websearch for an inmate in lewis and clark county. After an arrest in lewis and clark county, offenders are brought to the lewis & clark county detention center and. To 4:00 p. m to make arrangements to appear in court to. Websituated in helena, montana, lewis and clark county jail is a local correctional institution operated by lewis and clark county sheriff's office that is committed to providing a.