Laurieston Road
5100.0 m · net rise 177.2 m · total ascent 231.8 m · overall 3.5% · confidence: good · Carstramon Cleugh · Dumfries and Galloway
Shape: sustained — 40% of the climbing sits in a quarter of the distance; longest continuous stretch at 10%+ is 54 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.
≈ Overhead cover (tree canopy or structures) spans 26% 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) | ≈41% | 698–700 m | under overhead cover terrain reads 77.2% at 1486–1488 m across terrain that holds no road surface (dense canopy, no bench) — excluded |
| 3 m (diagnostic) | ≈36% | 698–701 m | under overhead cover terrain reads 60.7% at 1485–1488 m across terrain that holds no road surface (dense canopy, no bench) — excluded |
| 5 m | ≈24% | 1538–1543 m | under overhead cover terrain reads 51.8% at 1486–1491 m across terrain that holds no road surface (dense canopy, no bench) — excluded |
| 10 m | ≈22% | 704–714 m | under overhead cover terrain reads 35.7% at 684–694 m across terrain that holds no road surface (dense canopy, no bench) — excluded |
| 20 m | ≈20.0% | 698–718 m | under overhead cover terrain reads 25.5% at 684–704 m across terrain that holds no road surface (dense canopy, no bench) — excluded |
| 25 m | ≈19.6% | 698–723 m | under overhead cover terrain reads 24.9% at 684–709 m across a structure — excluded |
| 50 m | ≈14.4% | 698–748 m | under overhead cover terrain reads 20.5% at 684–734 m across a structure — excluded |
| 100 m | ≈10.3% | 698–798 m | under overhead cover terrain reads 13.3% at 684–784 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": 0.5,
"elevation_tiles": [
"data/cache/scotland/phase-3/dtm/NX65NW.tif",
"data/cache/scotland/phase-3/dtm/NX66SW.tif"
],
"calculated_at": "2026-08-18T18:41:01+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 3 50cm",
"elevation_tile_ids": [
"NX65NW",
"NX66SW"
],
"route_summit_trim_m": 1572.6,
"route_summit_trim_loss_m": 11.1,
"climb_origin": "discovered",
"notes": "Coarse pass: max 8.4% over 200 m (Terrain 50), gain 164.8 m over 6673 m way. KEPT at seed extent: no ascending continuation (min_avg=2.0%). ADOPTED (Scotland launch 2026-08-18): big-gain."
}