Designated trail
Backbone Trail BBT
Santa Monica Mountains National Recreation Area trail · California, United States
- Published length
- 108 km67 mi67 mi published
- Measured line
- 107.3 km66.7 mi−0.6% against published
- Line
- In the datasetLicence: ODbL 1.0
- Tier
- RegionalA long trail of 80 km (50 mi) or more
The map needs JavaScript. Download the line from this page.
- Main line
Line: OpenStreetMap, read 2026-11-08, drawn simplified to 30 m. Credit: © OpenStreetMap contributors (ODbL). Base map: OpenFreeMap, © OpenMapTiles, data © OpenStreetMap contributors.
The record
- Kind
- Designated trailDesignated, maintained and published as one trail by a land agency or a trail association
- Designation
- Santa Monica Mountains National Recreation Area trail
- Tier
- RegionalA long trail of 80 km (50 mi) or more
- Listing
- First setIn the first set of trails
- Where
- CA (California), United States
- Published length
- 108 km67 mi67 mi published. A check value, not measured from the line.
- Short name
- BBT
- Record ID
backboneStable: the directory name, never changed
Verification Checked 2026-11-08
- Measured
- YesThe line was downloaded and measured
- Published
- 108 km67 mi
- Measured
- 107.3 km66.7 migeodesic, from the line
- Difference
- −0.6%measured minus published
- Parts
- 2pieces left after joining ends within 100 m
Measured on the OSM relation: 107.3 km in 2 parts, 0.6% short of 108 km.
Source and licence
- Line in this dataset
- line.geojsonThe main line file of the record
- Source status
- FoundThe source was located but not downloaded
- Publisher
- National Park Service, Santa Monica Mountains NRA
- Source
- https://mapservices.nps.gov/arcgis/rest/services/NationalDatasets/NPS_Public_Trails_Geographic/FeatureServer/0Where to ask for the line: a layer or relation page
- Line source
- OpenStreetMap
- Format
- ArcGIS FeatureServer, filter TRLNAME LIKE '%Backbone%' (50 pieces)
- Main line
- Pieces only; not checked for completeness.How the main line is told apart from alternates, connectors and side trails
- Coordinates
- EPSG:4326What the source stores; published files are longitude/latitude (EPSG:4326)
- Licence
- ODbL 1.0
- Credit
- © OpenStreetMap contributors (ODbL)The credit line to show, as the source asks
- May be passed on
- YesThe source's terms allow its line to be passed on
- OpenStreetMap only
- YesOpenStreetMap is the only source of the included line
- Source checked
- 2026-11-08
- Newer release?
- arcgis-layer-edit-date: GET <layer>?f=json and read the layer's last edit date, when it exposes one (and the feature count); fetch again when either changesHow to tell whether the source has a newer release
What the source says
OpenStreetMap contributors, ODbL 1.0 (share-alike). Credit: © OpenStreetMap contributors. The OpenStreetMap copyright page states: 'You are free to copy, distribute, transmit and adapt our data, as long as you credit OpenStreetMap and its contributors.' (https://www.openstreetmap.org/copyright, read 2026-11-09). The line included here is from OpenStreetMap, relation 2748910.
With the page it was read on. Not legal advice.
OpenStreetMap
- Relation
- 2748910
- Note
- OSM 2748910.
Logo
No logo. No trail emblem exists. The file removed on 2026-11-08 was the generic NPS arrowhead (the agency mark, not the trail's), fetched from an NPS park page. The map draws the trail name only.
Every field of the record, with its exact value
As stored in trail.toml. The record schema says what each field means.
| Field | Value |
|---|---|
id | backbone |
name | Backbone Trail |
short_name | BBT |
country | US |
regions[0] | CA |
length_km | 108 |
length_note | 67 mi published |
tier | regional |
designation | Santa Monica Mountains National Recreation Area trail |
wave | 1 |
source.status | found |
source.publisher | National Park Service, Santa Monica Mountains NRA |
source.url | https://mapservices.nps.gov/arcgis/rest/services/NationalDatasets/NPS_Public_Trails_Geographic/FeatureServer/0 |
source.discovery | arcgis-layer-edit-date: GET <layer>?f=json and read the layer's last edit date, when it exposes one (and the feature count); fetch again when either changes |
source.format | ArcGIS FeatureServer, filter TRLNAME LIKE '%Backbone%' (50 pieces) |
source.crs | EPSG:4326 |
source.licence | ODbL-1.0 |
source.licence_text | OpenStreetMap contributors, ODbL 1.0 (share-alike). Credit: © OpenStreetMap contributors. The OpenStreetMap copyright page states: 'You are free to copy, distribute, transmit and adapt our data, as long as you credit OpenStreetMap and its contributors.' (https://www.openstreetmap.org/copyright, read 2026-11-09). The line included here is from OpenStreetMap, relation 2748910. |
source.attribution | OpenStreetMap contributors (ODbL) |
source.osm_only | true |
source.mainline | Pieces only; not checked for completeness. |
source.source_checked | 2026-11-08 |
source.redistributable | true |
source.line_source | OpenStreetMap |
source.line_file | line.geojson |
osm.relation | 2748910 |
osm.note | OSM 2748910. |
shield.status | no-logo-exists |
shield.logo_source | "" |
shield.contact | NPS Santa Monica Mountains NRA |
shield.note | No trail emblem exists. The file removed on 2026-11-08 was the generic NPS arrowhead (the agency mark, not the trail's), fetched from an NPS park page. The map draws the trail name only. |
shield.logo_file | "" |
shield.logo_owner | NPS Santa Monica Mountains NRA |
verification.verified | true |
verification.date | 2026-11-08 |
verification.measured_km | 107.3 |
verification.difference_percent | -0.6 |
verification.parts | 2 |
verification.note | Measured on the OSM relation: 107.3 km in 2 parts, 0.6% short of 108 km. |