Pine Hill Ecological Reserve is a nature reserve of 403acre located due east of Folsom Lake in the Sierra Nevada foothills, in El Dorado County, California. The reserve was established in 1979, and is managed by the California Department of Fish and Game. The Pine Hill Ecological Reserve is one unit of the much larger Pine Hill Preservesystem that consists of five separate units of varying size that total more than 4000acre and protects eight rare plants and their gabbro soil habitat. It is jointly managed by several local, state and federal agencies through a Cooperative Management Agreement.