Safety and sources

Use at your own risk

This app is information only. It is not a guide, a rescue service or professional advice.

Trail lines, danger layers and figures come from public sources and volunteers. They can be wrong or out of date, and conditions on a mountain change by the hour.

You decide whether and how to go, and you are responsible for your own safety and for anyone with you. We accept no liability to the extent the law allows.

Check the official weather, fire and avalanche bulletins on the day. Tell someone your route and when you expect to be back. In an emergency call 112.

Draft wording, not yet reviewed by a Spanish lawyer

Official bulletins

Emergency number in Spain: 112.

Where the data comes from

OpenStreetMap. Trail lines, difficulty grades, water crossings, restaurants and hotels. © OpenStreetMap contributors, Open Database Licence (ODbL).
Instituto Geográfico Nacional de España. Aerial photos and the topographic map. CC BY 4.0.
OpenFreeMap. The default map style and its vector tiles, from OpenStreetMap data (ODbL).
MITECO and IDEE. National flood zone map (SNCZI), shown as a live layer and sampled along each route on 2026-10-28. Free to use when the ministry is named as author.
EFFIS, Copernicus Emergency Management Service. Daily wildfire danger forecast, shown as a live layer. © European Union.
AEMET. Climate normals 1981 to 2010 for the heat figure, and the official warnings and avalanche bulletins we link to. Use is authorised when AEMET is named as author.
AWS Terrain Tiles. Elevation model used for climb and height profiles, built from public datasets including EU-DEM and SRTM.
Wikimedia Commons. Photographs, each credited on its trail page under its own Creative Commons licence.
Wikidata. The check that a route is a hiking or long distance trail, and the links to its entries. CC0.

How the grade is worked out

The grade is our own estimate, not an official one. It adds the distance in km and the climb in metres divided by 100, then 4 for a route steeper than 150 m per km, 3 for a highest point of 2,000 m or more and 3 more from 3,000 m, 4 for 0.1 km or more of demanding terrain and 10 for via ferrata. Under 9 is easy, under 18 is moderate and 18 or more is hard. A route that reaches 2,000 m, is steeper than 150 m per km or has demanding terrain is never graded easy. The danger tiles are separate: they show only what the data says about flooding, wildfire, heat, snow, river crossings and steep ground.

What this guide does not cover

Wildfire danger is live only and has no stored value per trail. Heat has a figure only where a long record weather station is close. Avalanche danger is covered only by linking the official bulletins. Exposure and river crossings depend on what volunteers have mapped. Photos taken near a route are matched by position and are not checked by hand.