Trawden to Robin Scar°
1616.6 m · net rise 106.9 m · total ascent 115.6 m · overall 6.6% · confidence: needs confirmation · Robin Scar · Lancashire
Shape: sustained — 36% of the climbing sits in a quarter of the distance; longest continuous stretch at 10%+ is 159 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 (53.8343, -2.1167)'). Corrections welcome.
needs review max10_over_40 — treat short-window maxima here as provisional.
Gradient ladder what do windows mean?
| Window | Maximum | Located at | |
|---|---|---|---|
| 2 m (diagnostic) | ≈49% | 73–75 m | under overhead cover terrain reads 55.4% at 1–3 m across a structure — excluded |
| 3 m (diagnostic) | ≈48% | 73–76 m | under overhead cover terrain reads 52.7% at 0–3 m across a structure — excluded |
| 5 m | 44% | 73–78 m | |
| 10 m | 42% | 73–83 m | |
| 20 m | ≈34.0% | 69–89 m | under overhead cover terrain reads 36.2% at 73–93 m across a structure — excluded |
| 25 m | ≈29.5% | 64–89 m | under overhead cover terrain reads 33.8% at 68–93 m across a structure — excluded |
| 50 m | ≈18.8% | 39–89 m | under overhead cover terrain reads 21.2% at 44–94 m across a structure — excluded |
| 100 m | ≈13.6% | 665–765 m | under overhead cover terrain reads 15.8% at 0–100 m across a structure — excluded |
may_start_earliermay_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": 1.0,
"elevation_tiles": [
"data/cache/england/bulk_dtm_1m/SD9035.tif"
],
"calculated_at": "2026-08-15T22:00:55+00:00",
"road_source": "OpenStreetMap (local PBF extract)",
"road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
"osm_pbf_path": "data/cache/pbf/england-2026-08-12-roads.osm.pbf",
"osm_snapshot": "2026-08-12T20:21:46Z",
"elevation_provider": "Environment Agency",
"elevation_dataset": "EA LIDAR Composite DTM 1m (2022)",
"elevation_licence": "Open Government Licence v3 \u2014 \u00a9 Environment Agency",
"elevation_coverage_id": "13787b9a-26a4-4775-8523-806d13af58fc__Lidar_Composite_Elevation_DTM_1m",
"elevation_tile_ids": [
"SD9035.tif"
],
"climb_origin": "discovered",
"notes": "Coarse pass: max 11.9% over 200 m (Terrain 50), gain 59.2 m over 1035 m way. EXTENDED by graph walk: +2 segment(s) at base, +0 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-53-8369-2-1258",
"naming_note": "auto-named from gazetteer (hypothesis, unreviewed); discovered as 'Discovered lane (53.8343, -2.1167)'"
}