Trail database (open data)

The trail network behind the app is built from OpenStreetMap. Under the Open Database Licence (ODbL) our derived database has to be shared under the same licence, so here it is.

Download uk-mtb-trails.geojson.gz

4.1 MB, gzip-compressed GeoJSON. 20,393 graded sections and 1,553 riding areas. Generated 2026-10-23. Licence and attribution notice.

Licence

The database is licensed under the Open Database Licence (ODbL) 1.0.
Attribution is required: "Contains data © OpenStreetMap contributors, available under the Open Database Licence", plus "Contains Environment Agency information © Environment Agency and/or database right" where you use the elevation-derived fields.
Share-alike: if you publicly use an adapted version of this database, you must offer your adapted database under the ODbL too, and keep the attribution. Using it to produce a map or a service is fine, with attribution.

What is in it

A GeoJSON FeatureCollection in WGS 84 (longitude, latitude), compressed with gzip. Coordinates are rounded to 6 decimal places (about 10 cm).

Section features (LineString), one for every graded section
Property	Meaning
`id`	Stable section id
`trail`, `trail_id`	Name and id of the trail the section belongs to
`area_id`	Id of the riding area (matches the area points)
`section_name`	Name of the section, if it has one
`grade`	`green`, `blue`, `red`, `black`, `orange`
`grade_source`	Where the grade came from: `official`, `route_colour`, `imba`, `mtb_scale` or `estimated`
`length_m`	Length in metres
`gain_m`, `loss_m`	Climb and descent in metres along the section's direction of travel
`max_grad_pct`	Steepest gradient, in percent
`kind`	`climb`, `flat`, `rolling` or `descent`
`direction`	`both`, `oneway`, `uphill` or `downhill`
`connector`	`true` for a link between trails rather than a trail in its own right

Riding areas are Point features with id, name and is_trail_centre.

Where it comes from, and what to be careful of

Elevation-derived fields (gain_m, loss_m, max_grad_pct, kind): in England from 1 m Environment Agency LIDAR, contains Environment Agency information © Environment Agency and/or database right, used under the Open Government Licence v3.0. Elsewhere from global terrain tiles, which are coarser.
Grades are estimates. Do not rely on them for safety. Fix mistakes in the source map at OpenStreetMap.

Questions about the data or the licence: hdlmstudios@gmail.com.