B.K. Leach Memorial Conservation Area is in northeastern Lincoln County. The original tracts of this 4,307-acre area were acquired in 1985 using Design for Conservation Sales Tax revenue and a private land donation from Ms. Mary Leach in memory of her late father.

Following the flood of 1993, 500 acres of land impacted by the river levee failure were acquired from willing sellers. In 2001, 2,900 acres of Wetland Reserve Program lands were acquired through a North American Wetlands Conservation Act (NAWCA) grant involving the Natural Resources Conservation Service, United States Fish and Wildlife Service, Ducks Unlimited, American Land Conservancy, Mary E. Leach Trust, Waterfowl USA, and Forrest Keeling Nursery.

The area contains a wide variety of wetland habitats, ranging from early successional marshes to deep backwater sloughs. The wetlands are managed to provide food for migrating waterfowl, while also providing habitat for resident marsh birds, and other wetland dependent wildlife.