- City of Boulder historic landmarks and districts (excluding contributing elements and potential districts),
- Boulder County historic landmarks,
- Boulder County historic districts and cultural landscapes,
- Colorado State Register of Historic Places-listed properties,
- National Register of Historic Places-listed properties, and
- National Historic Landmarks.
You can download this zip file, which contains an ESRI Layer Package file and accompanying shapefile of assembled info. The EPSG is 2876. Metadata is FGDC compliant and documents data sources, limits, and processing. Tabular data include designation type, parcel number, resource name.
NOTE: These data do not include protected information and are publicly available from their respective sources (City of Boulder, Boulder County, Colorado Office of Archaeology and Historic Preservation, and National Park Service).