Croftown to Corrieshalloch Gorge°
7363.4 m · net rise 174.0 m · total ascent 240.3 m · overall 2.4% · confidence: good · Auchindrean · Highland
Shape: stepped — 53% of the climbing sits in a quarter of the distance; longest continuous stretch at 10%+ is 74 m.
Found purely from mapping and LiDAR data, and not yet matched against books, race records or lists — it may be well known to locals under a name we've never heard. It was cross-checked against the OS road network, surface models and map tags, but a discovery can still be an artifact of the terrain model or the map. Treat it as a well-evidenced hypothesis until someone has ridden it. If you know this road, tell us what you found — photographs, corrections and local knowledge all welcome; the map links below let you scout it first.
° The name is provisional: this climb is not yet matched to a documented name, so it was named from nearby map places. There is no evidence of local usage — (auto-named from gazetteer (hypothesis, unreviewed); discovered as 'Discovered lane (57.7841, -5.0385)'). Corrections welcome.
Gradient ladder what do windows mean?
| Window | Maximum | Located at | |
|---|---|---|---|
| 2 m (diagnostic) | ≈23% | 5847–5849 m | under overhead cover terrain reads 146.1% at 5780–5782 m across a structure — excluded |
| 3 m (diagnostic) | ≈19% | 5885–5888 m | under overhead cover terrain reads 144.6% at 5780–5783 m across a structure — excluded |
| 5 m | ≈16% | 5874–5879 m | under overhead cover terrain reads 138.5% at 5780–5785 m across a structure — excluded |
| 10 m | ≈13% | 5871–5881 m | under overhead cover terrain reads 107.1% at 5780–5790 m across a structure — excluded |
| 20 m | ≈12.6% | 5868–5888 m | under overhead cover terrain reads 66.8% at 5779–5799 m across a structure — excluded |
| 25 m | ≈12.3% | 5866–5891 m | under overhead cover terrain reads 54.6% at 5779–5804 m across a structure — excluded |
| 50 m | ≈11.3% | 5996–6046 m | under overhead cover terrain reads 32.0% at 5779–5829 m across a structure — excluded |
| 100 m | ≈11.0% | 6003–6103 m | under overhead cover terrain reads 20.9% at 5779–5879 m across a structure — excluded |
Map
Check this route yourself: Google Maps route via their router · Street View at the base where coverage exists · geojson.io our exact measured line · OpenTopoMap
This climb's data: OCL JSON — the full gradient ladder, quality flags and provenance in the OpenClimb Ladder format.
Ridden it, or know better? Submit data for this climb no account needed
© OpenStreetMap contributors · topo tiles © OpenTopoMap (CC-BY-SA) · vector tiles OpenFreeMap
Profile
Provenance
{
"analysis_version": "0.1.0",
"sample_interval_m": 1.0,
"interpolation": "bilinear",
"smoothing": "none",
"gradient_windows_m": [
5.0,
10.0,
20.0,
25.0,
50.0,
100.0
],
"diagnostic_windows_m": [
2.0,
3.0
],
"elevation_crs": "EPSG:27700",
"elevation_resolution_m": 1.0,
"elevation_tiles": [
"data/cache/scotland/phase-2/dtm/NH17.tif",
"data/cache/scotland/phase-2/dtm/NH27.tif",
"data/cache/scotland/phase-2/dtm/NH18.tif"
],
"calculated_at": "2026-08-18T18:40:09+00:00",
"road_source": "OpenStreetMap (local PBF extract)",
"road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
"osm_pbf_path": "data/cache/pbf/scotland-2026-08-14-roads.osm.pbf",
"osm_snapshot": "2026-08-13T20:21:01Z",
"elevation_provider": "Scottish Remote Sensing Portal (AWS Open Data, srsp-open-data)",
"elevation_licence": "Open Government Licence v3 \u2014 \u00a9 Scottish Government, SEPA and partners; Crown copyright",
"elevation_dataset": "Scottish Public Sector LiDAR Phase 2 1m",
"elevation_tile_ids": [
"NH17",
"NH27",
"NH18"
],
"climb_origin": "discovered",
"notes": "Coarse pass: max 10.6% over 200 m (Terrain 50), gain 136.8 m over 6492 m way. EXTENDED by graph walk: +1 segment(s) at base, +2 at top (stop: base=no_descending_continuation, top=no_ascending_continuation; min_avg=2.0%). Review before adopting. ADOPTED (Scotland launch 2026-08-18): big-gain. AUTO-NAMED from gazetteer (hypothesis, unreviewed): was 'Discovered lane (57.7841, -5.0385)'.",
"naming_note": "auto-named from gazetteer (hypothesis, unreviewed); discovered as 'Discovered lane (57.7841, -5.0385)'"
}