Hopewell Culture National Historical Park partners with local organizations to fulfill its mission to preserve, protect, and interpret the remnants of the park's five earthwork complexes.

Ohio Historical Society

The Seip Earthworks unit is co-owned with the Ohio Historical Society to preserve these archeological and historical resources. The majority of visitor facilities at this park unit are managed by OHS.

Ross County Park District

Recreational trails at the Hopewell Mound Group are the result of a partnership with the Ross County Park District. This partner helped convert a mile of abandoned B & O railroad corridor to the Tri-County Triangle Trail.

Tri-County Triangle Trail

The bike trail at the Hopewell Mound Group is a partnership with the Tri-County Triangle Trail, a non-profit organization that seeks to create a 64-mile trail connecting the towns of Chillicothe, Frankfort, Washington Courthouse, and Greenfield.