Mother Neff State Park is a 259-acre (105 ha) state park located on the Leon River west of Moody, Texas in Coryell County. The park is part of Mother Neff State Park and F.A.S. 21-B(1) Historic District, which was added to the National Register of Historic Places on October 2, 1992. Company 817 of the Civilian Conservation Corps built the park from 1934 to 1938. The Company quarried stone and cut wood to build the structures that are still in use in the park today. Most of Mother Neff Park sits in the flood plain of the Leon River and flooding shut the park down in 1992 and again in 2007.