Auchengreoch Road
2885.1 m · net rise 160.1 m · total ascent 163.3 m · overall 5.5% · confidence: needs confirmation · Spateston · Renfrewshire
Shape: sustained — 40% of the climbing sits in a quarter of the distance; longest continuous stretch at 10%+ is 156 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.
needs review short_window_divergence — treat short-window maxima here as provisional.
≈ Overhead cover (tree canopy or structures) spans 20% of this route — detected by comparing the surface model (DSM, treetops and rooftops) against the terrain model (DTM, bare ground). Under cover the bare-ground model is built from fewer laser returns, so metre-scale readings can wobble; maxima whose window sits in a covered zone are marked ≈ below — less certain — the flag does not say whether the true value is higher or lower. Longer windows average over more clean ground and are steadier.
Gradient ladder what do windows mean?
| Window | Maximum | Located at | |
|---|---|---|---|
| 2 m (diagnostic) | 38% | 2132–2134 m | |
| 3 m (diagnostic) | ≈31% | 1336–1339 m | under overhead cover |
| 5 m | ≈27% | 1334–1339 m | under overhead cover |
| 10 m | ≈19% | 1329–1339 m | under overhead cover terrain reads 22.1% at 1334–1344 m across terrain that holds no road surface (dense canopy, no bench) — excluded |
| 20 m | ≈13.7% | 1962–1982 m | under overhead cover terrain reads 18.0% at 1331–1351 m across terrain that holds no road surface (dense canopy, no bench) — excluded |
| 25 m | ≈13.5% | 1959–1984 m | under overhead cover terrain reads 17.1% at 1331–1356 m across terrain that holds no road surface (dense canopy, no bench) — excluded |
| 50 m | ≈13.2% | 1944–1994 m | under overhead cover |
| 100 m | ≈12.5% | 1943–2043 m | under overhead cover |
may_continue_beyond_end Extent detection suggests reviewing where this climb starts/ends.
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": 0.5,
"elevation_tiles": [
"data/cache/scotland/phase-6/dtm/NS45NW.tif",
"data/cache/scotland/phase-6/dtm/NS46SW.tif"
],
"calculated_at": "2026-08-18T18:37:06+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 6 50cm",
"elevation_tile_ids": [
"NS45NW",
"NS46SW"
],
"climb_origin": "discovered",
"notes": "Coarse pass: max 11.8% over 200 m (Terrain 50), gain 85.8 m over 1321 m way. EXTENDED by graph walk: +8 segment(s) at base, +2 at top (stop: base=no_descending_continuation, top=no_ascending_continuation; min_avg=2.0%). Review before adopting. DEDUPE: absorbed 1 overlapping proposal(s): discovered-lane-55-8112-4-5254 ADOPTED (Scotland launch 2026-08-18): big-gain."
}