Located in Coos County, New Hampshire and Oxford County, Maine, Umbagog National Wildlife Refuge is a northern treasure in the National Wildlife Refuge System. The diversity of exceptional habitats provides excellent breeding and foraging areas for migratory birds, endangered species, resident wildlife, and rare plants. The refuge protects over 25,650 acres (103.8 km²) of wetland and forested upland habitat along Umbagog Lake.