Licensing
Trail geometry, elevation and land-manager information each come from somewhere, under a licence. Some of those licences require us to say so, and all of them are worth knowing when you're deciding how much to trust a number.
Trail geometry — the line on the ground, and the waypoints along it.
Attribution is mandatory wherever the geometry appears, and share-alike applies to derived geodata. OSM-derived geometry stays in its own clearly attributed layer and is not commingled with proprietary derived data.
Licence and termsPark boundaries, official closures, land-manager contact details.
No attribution required. Credited anyway, because knowing where a closure notice came from is part of judging it.
Licence and termsPermits, passes and reservable facilities.
No attribution required. Credited for the same reason.
Licence and termsTrail signage, forest orders and Adventure Pass requirements.
No attribution required.
Licence and termsElevation. Every gain, grade and high-point figure on the site, and the terrain shading under every trail map (1/3 arc-second DEM, hillshaded at build time).
No attribution required. Worth naming because elevation is where numbers most often disagree between apps.
Licence and termsThe forecast and every official watch and warning in “Right now”.
No attribution required. Named on every reading anyway — an alert is only as strong as knowing who issued it.
Licence and termsActive wildland fire incident locations in “Right now”.
Attribution requested by the publisher, so every fire reading names NIFC WFIGS. Incident data is operational and can lag the ground truth.
Licence and termsStreamflow readings beside the waterfall spots, from named gauges.
No attribution required. Readings are provisional and labelled as such; each one links its gauge.
Licence and termsAir-quality index readings in “Right now”.
EPA asks that observations be presented as preliminary, which they are — the label is part of the reading.
Licence and termsSnow sensor readings for the Eastern Sierra spots, from named stations.
Credited with station name and elevation, so a ridge-top sensor is never mistaken for a reading at the lake.
Licence and termsRead straight from the catalogue rather than written down here, so it cannot drift away from what is actually being served. Every trail carries its own source and licence — the database will not accept one without them.
| Trail | Source | Licence |
|---|---|---|
| Arch Rock Trail | OpenStreetMap contributors | ODbL 1.0 |
| Backbone Trail to Sandstone Peak | OpenStreetMap contributors | ODbL 1.0 |
| Barker Dam Trail to Barker Dam | OpenStreetMap contributors | ODbL 1.0 |
| Cataract Trail to Laurel Dell Falls | OpenStreetMap contributors | ODbL 1.0 |
| Devils Backbone Trail to Mount San Antonio | OpenStreetMap contributors | ODbL 1.0 |
| Eaton Canyon Trail to Eaton Canyon Falls | OpenStreetMap contributors | ODbL 1.0 |
| Escondido Canyon Trail to Escondido Falls | OpenStreetMap contributors | ODbL 1.0 |
| Gabrielino Trail to Sturtevant Falls | OpenStreetMap contributors | ODbL 1.0 |
| Hidden Valley Trail to Mission Peak | OpenStreetMap contributors | ODbL 1.0 |
| Icehouse Canyon Trail to Icehouse Saddle | OpenStreetMap contributors | ODbL 1.0 |
| Little Lakes Valley Trail to Gem Lakes | OpenStreetMap contributors | ODbL 1.0 |
| Lost Horse Mine Trail | OpenStreetMap contributors | ODbL 1.0 |
| Lower Sam Merrill Trail to Echo Mountain | OpenStreetMap contributors | ODbL 1.0 |
| Millard Falls Trail | OpenStreetMap contributors | ODbL 1.0 |
| Parker Lake Trail | OpenStreetMap contributors | ODbL 1.0 |
| Pfeiffer Falls Trail | OpenStreetMap contributors | ODbL 1.0 |
| Plank Walk Trail to East Peak | OpenStreetMap contributors | ODbL 1.0 |
| Ridge Trail to Borel Hill | OpenStreetMap contributors | ODbL 1.0 |
| Ryan Mountain Trail | OpenStreetMap contributors | ODbL 1.0 |
| Solstice Canyon Trail to Tropical Terrace | OpenStreetMap contributors | ODbL 1.0 |
| Tomales Point Trail | OpenStreetMap contributors | ODbL 1.0 |
| Valley View Trail | OpenStreetMap contributors | ODbL 1.0 |
Images are licensed separately and credited individually — photographer, licence and source for every photograph.
Distances and climb figures are computed from the trail line and the elevation model, not copied from another app. They will not always agree with one you have used before — different sources, different smoothing. Where a figure is seed data rather than importer output, the table above says so.