SOURCES & LICENSES

Credits.

Roads & elevation

Route geometry © OpenStreetMap contributors, distributed under the Open Database License. Routes calculated by BRouter; route elevation from SRTM / CGIAR-CSI, smoothed over a 100 m distance window.

Alpe d’Huez: Bourg-d’Oisans to Alpe d’Huez, retrieved October 22, 2026. Col du Lautaret: the shorter ascent from Villar-d’Arêne, retrieved October 23, 2026. Distances and ascent are computed from these profiles, not an official climb survey.

Download the complete derived route definitions · Source queries and dates

Terrain

Adapted from Mapzen Terrain Tiles, Skadi N45E006. SRTM data courtesy of the U.S. Geological Survey. European terrain produced using Copernicus data and information funded by the European Union (EU-DEM). Terrain is adjusted near the road to meet the course profile. Provider attribution and terms.

Typography & illustrations

Manrope by Mikhail Sharanda and contributors, distributed under the SIL Open Font License. Fonts are hosted locally. Route illustrations use the desktop app’s geometry and renderer; session charts are illustrative examples.

Alpine is a provisional product name. The website does not imply endorsement by equipment manufacturers or data providers.