Hartsook (also, Richardson Grove) is a former settlement in Humboldt County, California. It was located 6.5 miles (10.5 km) south of Garberville.
A post office opened at Hartsook in 1926, and was moved and renamed to Richardon Grove in 1938. Richardson Grove refers to Richardson Grove State Park. Hartsook was named after photographer and resort owner Fred Hartsook.
References
Hartsook, California Wikipedia(Text) CC BY-SA