Free-flowing river segments with outstanding values assessed for potential Wild and Scenic River designation, maintained by the National Park Service. 2016 version.
3,213 segments | LineString | National (including Alaska, Hawaii, Puerto Rico)
Source: NPS Nationwide Rivers Inventory
PMTiles source-layer name: nri-2016
Line features were hexed to H3 resolution 8 by buffering each segment by the H3 cell circumradius before polyfill.