Bear Valley National Wildlife Refuge was established in 1978 to protect a major night roost site for wintering bald eagles in Southern Oregon. The refuge consists of 4,200 acres, primarily of old growth ponderosa pine, incense cedar, and white and Douglas fir. These mature stands of trees have open branching patterns of large limbs which allow easy eagle access and can support many birds. Located on a northeast slope, the roost also shelters these raptors from the harsh and prevailing winter winds. In recent years, as many as 300 bald eagles have used the roost in a single night. Bear Valley National Wildlife Refuge also serves as a nesting habitat for several bald eagle pairs. To reduce disturbance to the birds, Bear Valley Refuge is closed to all public entry except for walk-in deer hunting before November 1.