Saco Heath Preserve is a 1,233-acre nature preserve in Saco, Maine, managed by the Nature Conservancy. It protects a bog landscape that includes one of the state's largest stands of Atlantic white cedar and supports one of only two known Maine populations of the Hessel's hairstreak butterfly, making it especially important ecologically. A narrow boardwalk about 1 mile long passes through a small section of the bog and provides access into the preserve, though it was closed during the COVID-19 pandemic.