Chronic Wasting Disease (CWD) has been confirmed for the first time in a free-ranging herd west of the Continental Divide in Montana. The first case was a female white-tailed deer Montana Fish, Wildlife and Parks (FWP) officers killed in the town of Libby, MT after a resident reported seeing an emaciated, sick-looking doe. When tests in late May confirmed the deer was CWD positive, FWP initiated the response called for in the state’s CWD Management Plan. FWP established an Incident Command Team led by Region 1 Supervisor Jim Williams; defined an Initial Response Area (IRA) within a 10-mile radius of the location where the deer was found; began collecting additional deer within the IRA; began sampling road-killed deer, elk, and moose in surrounding areas; and launched an outreach campaign to keep the public informed and request observations of deer that appear abnormal.