Many national parks have GIS data available for download through the National Park Service Data Store. While checking the license of available GIS data is always appropriate, US Government works are in the public domain. There are some files very relevant to OSM (trails and roads; recreation points listing campsites, docks etc) and some not so useful to the normal OSM reader (wildlife habitats).
National Park Trails
See the Hiking page for general tags related to hiking trails.
- route_owner = national_park, private_on_nps, private_noton_nps, county, state, city_town
Great Smoky Mountains National Park
- Status: Park is reviewing upgrade of all GIS data, plan to bulk import upon public release --tpcolson 09 March 2013
Olympic National Park
See: Olympic National Park
Grand Teton National Park
- Currently working on roads from this dataset. There is no way to tell the road designation that I can see, so I am uploading everything with highway=road and planning on manually fixing/combining with the (untouched) TIGER data. Alexrudd
||Just changed the tag case
||Closed(0), Admin.(1), or Private(2) -> access:private. Public (3) left alone
||Natural(0)->ground, Gravel(1)->gravel, Asphalt(2)->paved, Concrete->paved(3), Chip Seal(4)->chip_seal??
||Kept for now, use later to add to proper relations
||Class type: Heavy Duty(0)->grade1, Medium Duty(1)->grade2, Light Duty(2)->grade3, Unimproved dirt(3)->grade4
||Sequential identifier within the shapefile
||Differential Base Station Used
||Maximum Positional Delusion of Precision
||Method used by NPS to digitize data
||Roadway Inventory Program Number
||Recreational Opportunity Spectrum Class
||Specific type of GPS receiver used to collect the data
||Automatically generated length of way