GIS Data

GIS Data

The National Trails office provides GIS data for national historic trail alignments via the Integrated Resource Management Applications Portal (IRMA). IRMA is the National Park Service's data and information clearinghouse and houses the authoritative datasets, as ESRI shapefiles/feature services, for NPS administered or co-administered trail alignments. These geospatial datasets are available for public download and use. Below are the links to IRMA references for each of the trail alignments:

Last updated: April 1, 2020