Sources and licenses
Every page on this site is built from open data. This page lists each source, what we use it for and its license. Naming a source does not mean that agency or project endorses this site.
| Data | Source | Used for | License |
|---|---|---|---|
| Hot spring names, coordinates and source temperatures | NOAA National Centers for Environmental Information, Thermal Springs List for the United States (NCEI Accession 0303600, doi:10.25921/c8p0-zs06; data from about 1980) | All hot springs pages, maps | "Not subject to copyright protection in the United States"; NOAA waives rights worldwide under CC0 1.0 |
| River flow now and by month | U.S. Geological Survey, Water Data API (latest continuous values; daily values 2016-2025, averaged by month by outdoorstime) | Waterfall flow now, CFS converter | USGS-authored data: U.S. public domain. Values are provisional. |
| Weather by month | NOAA NCEI, U.S. Climate Normals 1991-2020 (monthly), nearest station within 40 km | Hot spring pages | U.S. government work, public domain (17 U.S.C. 105) |
| City centers | U.S. Census Bureau, 2024 Gazetteer Files (places) | "Hot springs near" pages | U.S. government work, public domain |
| State boundaries on maps | U.S. Census Bureau cartographic boundaries, via the us-atlas package | Maps | Public domain data; us-atlas code ISC license |
| Trail length, fees, hours, seasons, managers | USDA Forest Service, Bureau of Land Management, National Park Service, state park agencies (linked on each page, checked October 2026) | Place pages | Facts rewritten in our words; agency texts are not copied |
| Fonts | Epilogue, Rethink Sans and Ubuntu Sans Mono, served from our own server | All pages | SIL Open Font License 1.1 (Ubuntu Sans Mono: Ubuntu Font Licence 1.0) |
| Site code | Astro (static site generator) | Building the pages | MIT |
Notes
- Works of the U.S. federal government are not protected by copyright (17 U.S.C. 105). Data from states and other bodies may have other rules; each row above names the license we read.
- We do not use agency logos, seals or insignia.
- Figures are unofficial copies for general information. Always check the official source.