Designated trail

Idaho Centennial Trail ICT

State of Idaho trail · Idaho, United States

Published length: 1,448 km900 miabout 900 mi published
Measured line: 292.5 km182 mi−79.8% against published
Line: In the dataset, partialLicence: 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 2026-11-09, drawn simplified to 30 m. Credit: © OpenStreetMap contributors (ODbL). Base map: OpenFreeMap, © OpenMapTiles, data © OpenStreetMap contributors.

Download the line

Partial line

The line in the dataset measures 292.5 km against a published 1,448 km (−79.8%).

OpenStreetMap holds less than half the trail: relation 10758083 ('Idaho Centennial Trail (West)') and the short relation 19215740 give 292.5 km in 5 parts, 79.8% short of 1,448 km (about 900 mi). No whole-trail relation is mapped.

GPX is simplified to 5 m for devices. GeoJSON is the full-resolution line as published in this dataset. Neither carries elevation.

Main line292.5 km measured in 5 parts · OpenStreetMap

Main line: GPX, 202 KB Main line: GeoJSON, 393 KB

Credit the source

Licence: ODbL 1.0

Lines from OpenStreetMap need the credit “© OpenStreetMap contributors” and stay under the ODbL (share-alike).

release.txt: the source, licence and date the line files came from.

The record

Kind: Designated trailDesignated, maintained and published as one trail by a land agency or a trail association
Designation: State of Idaho trail
Tier: RegionalA long trail of 80 km (50 mi) or more
Listing: First setIn the first set of trails
Where: ID (Idaho), United States
Published length: 1,448 km900 miabout 900 mi published. A check value, not measured from the line.
Short name: ICT
Record ID: idaho-centennialStable: the directory name, never changed

Verification Checked 2026-11-09

Measured: YesThe line was downloaded and measured

Published: 1,448 km900 mi
Measured: 292.5 km182 migeodesic, from the line
Difference: −79.8%measured minus published
Parts: 5pieces left after joining ends within 100 m

Within 15% of the published length Beyond 15%: the record must say why

OpenStreetMap holds the west half only: 292.5 km in 5 parts, 79.8% short of 1,448 km.

Why the lengths differ: see the notice in Download the line.

Source and licence

Line in this dataset: line.geojsonThe main line file of the record
Source status: OpenStreetMap onlyThe only source is an OpenStreetMap route relation
Publisher: Idaho Department of Parks and Recreation
Publisher’s page: https://services1.arcgis.com/CNPdEkvnGl65jCX8/arcgis/rest/services/Idaho_Centennial_Trail_(Official_Route)_view/FeatureServer/52
Source: https://www.openstreetmap.org/relation/10758083Where to ask for the line: a layer or relation page
Line source: OpenStreetMap
Format: Two OpenStreetMap route relations (10758083 and 19215740), read through Overpass with all member ways
Main line: OpenStreetMap holds no whole-trail relation. 10758083 'Idaho Centennial Trail (West)' is the west half; 19215740 adds a short piece at Upper Priest Lake. Both are in line.geojson; no alternates are mapped.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
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: 2026-11-09
Newer release?: osm-relation-version: Overpass rel(10758083,19215740); out meta; (version and timestamp), or the Geofabrik replication diff; fetch again when it changesHow to tell whether the source has a newer release
Decision: Included with its name and logo. The line is from OpenStreetMap.

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 10758083. The publisher's own line is not licensed for redistribution and is not used.

With the page it was read on. Not legal advice.

OpenStreetMap

Relation: 10758083
Note: 10758083 is the west half and 19215740 a short piece at Upper Priest Lake; 83 ways in all. Downloaded 2026-11-09.

Logo

Logo not found. No trail logo file found: Idaho Parks and Recreation publishes the agency logo, not an Idaho Centennial Trail emblem. Retried 2026-11-08: idahoparks.org is a scripted site that exposes no logo file, the State of Idaho's ArcGIS item thumbnail is a map preview, and Idaho Trails Association and Commons have no ICT emblem.

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`	idaho-centennial
`name`	Idaho Centennial Trail
`short_name`	ICT
`country`	US
`regions[0]`	ID
`length_km`	1448
`length_note`	about 900 mi published
`tier`	regional
`designation`	State of Idaho trail
`wave`	1
`source.status`	osm-only
`source.publisher`	Idaho Department of Parks and Recreation
`source.publisher_url`	https://services1.arcgis.com/CNPdEkvnGl65jCX8/arcgis/rest/services/Idaho_Centennial_Trail_(Official_Route)_view/FeatureServer/52
`source.url`	https://www.openstreetmap.org/relation/10758083
`source.discovery`	osm-relation-version: Overpass `rel(10758083,19215740); out meta;` (version and timestamp), or the Geofabrik replication diff; fetch again when it changes
`source.format`	Two OpenStreetMap route relations (10758083 and 19215740), read through Overpass with all member ways
`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 10758083. The publisher's own line is not licensed for redistribution and is not used.
`source.attribution`	OpenStreetMap contributors (ODbL)
`source.osm_only`	true
`source.mainline`	OpenStreetMap holds no whole-trail relation. 10758083 'Idaho Centennial Trail (West)' is the west half; 19215740 adds a short piece at Upper Priest Lake. Both are in line.geojson; no alternates are mapped.
`source.decision`	included-named
`source.decision_text`	Included with its name and logo. The line is from OpenStreetMap.
`source.source_checked`	2026-11-09
`source.redistributable`	true
`source.line_source`	OpenStreetMap
`source.line_file`	line.geojson
`source.length_gap_note`	OpenStreetMap holds less than half the trail: relation 10758083 ('Idaho Centennial Trail (West)') and the short relation 19215740 give 292.5 km in 5 parts, 79.8% short of 1,448 km (about 900 mi). No whole-trail relation is mapped.
`osm.relation`	10758083
`osm.note`	10758083 is the west half and 19215740 a short piece at Upper Priest Lake; 83 ways in all. Downloaded 2026-11-09.
`shield.status`	logo-not-found
`shield.logo_source`	""
`shield.contact`	Idaho Department of Parks and Recreation
`shield.note`	No trail logo file found: Idaho Parks and Recreation publishes the agency logo, not an Idaho Centennial Trail emblem. Retried 2026-11-08: idahoparks.org is a scripted site that exposes no logo file, the State of Idaho's ArcGIS item thumbnail is a map preview, and Idaho Trails Association and Commons have no ICT emblem.
`shield.logo_file`	""
`shield.logo_owner`	Idaho Department of Parks and Recreation
`verification.verified`	true
`verification.date`	2026-11-09
`verification.measured_km`	292.5
`verification.difference_percent`	-79.8
`verification.parts`	5
`verification.note`	OpenStreetMap holds the west half only: 292.5 km in 5 parts, 79.8% short of 1,448 km.