It is found in Otonabee Township approximately 30 kilometers south of Peterborough. The reserve consists of approximately 1,952 acres (7.90 km2) of land of which 1523 are under certificates of possession.
The Serpent Mounds, Canada, illustration c. 1907, from The Serpent Mound, Adams County, Ohio.
Indigenous peoples occupied this area for thousands of years before European contact. Nearly 2000 years ago, people of the Point Peninsula Complex built a series of earthenmounds for ceremonial, religious and burial purposes. Archaeological excavations have shown the people had sophisticated knowledge to build the massive earthworks. Nine mounds or burial places have been located at the south end of the park. Serpent Mounds Park includes an effigy mound, four to six feet high and nearly two hundred feet long, with a related egg-shaped mound by its mouth.