A high resolution map of the District’s Park System can be accessed at the governmentattic.org website. It’s a very large, interactive file and very slow to load.
It is described as:
High resolution map of the Park System of the Nations Capital and Environs under Jurisdiction of National Capital Region – National Park Service United States Department of Interior (NPS 869/80,251-I), November 2008
Released date: 06-February-2013. Posted date: 11-February-2013
Source of document: National Park Service
The actual map is too large a file to upload to this website so two extracts are provided below:
Extract covering most of the central city
Higher resolution extract of Capitol Hill area (6.8 MB)
The Legend, with NPS shown in green, transferred to DC jurisdiction in gray, and the red reservation numbers indicates they have been disposed of.