USGS Nationwide trails database - NDT2
By National Digital Trails
May 2021 (approx.)
Detailed Description
The image above shows nationwide distribution of USGS trails data received from over 35 state agencies. The trails that are in the USGS dataset are displayed in yellow. States that have contributed trails data are displayed in black and states with no trails data in the USGS dataset are displayed in gray.
Sources/Usage
Public Domain.