Author James A. Michener donated the High Rocks area to the park in 1956.
Ralph Stover State Park was the site of an 18th-century gristmill that was built on Tohickon Creek by the park's namesake, Ralph Stover.
Ralph Waldo Emerson | Ralph Lauren | Ralph Nader | Ralph Vaughan Williams | Ralph Fiennes | Ralph Steadman | Ralph Macchio | Ralph Bunche | Ralph Bakshi | Ralph Richardson | Ralph Stanley | Ralph McTell | Ralph Ellison | Ralph Jordan | Ralph | Ralph Abercromby | Ralph Molnar | Ralph Records | Ralph Peterson, Jr. | Ralph Klein | Ralph H. Fowler | Ralph Tresvant | Ralph Moore | Ralph Wilson | Ralph Terry | Ralph "Shug" Jordan | Ralph Peterson | Ralph Percy, 12th Duke of Northumberland | Ralph Inzunza | Ralph Darling |
The next addition to the park was the High Rocks unit of Ralph Stover State Park, donated to the Commonwealth by the late James Michener, a famous local author.