sentences:  Said to have the 9th largest tree of all remaining Coast Redwoods, it is known for swimming on the South Fork of the Eel River and day use in addition to 159 campsites.The park is named after Friend Richardson, the 25th Governor of California between 1923 and 1927.The first road through Richardson Grove, eventually to become US 101, was constructed in approximately 1915 and first surfaced, most likely with gravel and oil, in 1927.