High Potential Historic Sites are defined in the National Trails System Act, as: “…those historic sites related to the route, or sites in close proximity thereto, which provide opportunity to interpret the historic significance of the trail during the period of its major use."
In order to be selected as HPHS, each site needed to meet one or more of the following selection criteria:
* Scenic Quality
* Sense of Place
* Freedom from Intrusion
* Presence of Historic Remnants
The National Park Service completed an initial inventory of 78 HPHS along the originally designated portion of the Lewis and Clark National Historic Trail in 2018. Beginning in 2020, the National Park Service selected a contractor
to begin conducting research to identify HPHS along this newly designated Eastern Extension of the trail. Funding for this research was generously provided by the National Park Foundation. We are currently working to identify the final
selection of HPHS and look forward to sharing them soon.
Source: U.S. Department of the Interior, National Park Service
