About the data
Sources & credits
TrailsTV is built on public data from federal agencies and the OpenStreetMap community.
Data sources
| Source | Used for | License |
|---|---|---|
| National Park Service | Park info, alerts, closures, campgrounds, webcams | Public domain |
| National Weather Service | Forecasts & weather alerts | Public domain |
| U.S. Geological Survey | River flow, gage height & water temperature | Public domain |
| USDA NRCS SNOTEL | Snow depth & snowpack | Public domain |
| NOAA Tides & Currents | Tide predictions | Public domain |
| EPA AirNow | Air quality & wildfire smoke | Public domain |
| National Interagency Fire Center | Active wildfire perimeters | Public domain |
| Recreation.gov (RIDB) | Campsite details, boat launches & campground booking | Public domain |
| Avalanche.org | Avalanche danger from regional avalanche centers | Used with attribution |
| OpenStreetMap contributors | Trail lines & trail-use tags | ODbL |
Maps
| Source | Used for |
|---|---|
| USGS The National Map | Topo base map |
| OpenTopoMap | Topo base map (CC-BY-SA) |
| Esri World Imagery | Satellite imagery |
| OpenStreetMap | Street map (ODbL) |
| Leaflet | Map software |
Good to know
- TrailsTV is independent and not affiliated with or endorsed by the National Park Service.
- Conditions change fast and data can be delayed or incomplete. Always check posted rules, closures and official park alerts before you go.
- Park passes, permits and campsite reservations are sold only through Recreation.gov and the NPS.
- Trail-use info comes from OpenStreetMap tags. “Not recorded” doesn't mean allowed; most park trails prohibit bikes and dogs.
- Trail data © OpenStreetMap contributors, available under the Open Database License. Park photos are credited where shown.