The overriding goal of the Sideling Hill WMA in eastern Allegany and western Washington Counties is to provide forest wildlife habitat and protection for water quality in Sideling Hill Creek.  Dramatic rock formations include scenic cliffs and rocky outcrops of Devonian shale and Chemung and Hampshire sandstone. The steep shale barrens along sections of Sideling Hill Creek support a number of plants that are endemic, meaning they only occur on these barrens and nowhere else. In 1986, DNR identified Natural Heritage Areas on this WMA, affording protection to a large number of rare, threatened or endangered plants, including the State and Federally Endangered plant, Harperella (Ptilimnium nodosum) pictured here.