Barber's Hill
6051.5 m · net rise 275.9 m · total ascent 383.1 m · overall 4.6% · confidence: good · The Dingle · Sir Ddinbych / Denbighshire
Shape: sustained — 41% of the climbing sits in a quarter of the distance; longest continuous stretch at 10%+ is 247 m.
Matches: British National Hill Climb Championship — Venue 1950 (as "Barber's Hill", Llangollen; winner Ronnie Stringwell, 4'33"). This is the road over Barber's Hill — the route passes 138 m from the OS summit point. The exact 1950 course section within it is an open question for period records or local knowledge..
≈ Overhead cover (tree canopy or structures) spans 38% 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) | ≈55% | 2082–2084 m | under overhead cover terrain reads 130.7% at 661–663 m across a structure — excluded |
| 3 m (diagnostic) | ≈50% | 2082–2085 m | under overhead cover terrain reads 104.7% at 661–664 m across a structure — excluded |
| 5 m | ≈37% | 2157–2162 m | under overhead cover terrain reads 73.7% at 660–665 m across terrain that holds no road surface (dense canopy, no bench) — excluded |
| 10 m | ≈31% | 2156–2166 m | under overhead cover terrain reads 49.8% at 599–609 m across terrain that holds no road surface (dense canopy, no bench) — excluded |
| 20 m | ≈24.9% | 2329–2349 m | under overhead cover terrain reads 34.8% at 591–611 m across terrain that holds no road surface (dense canopy, no bench) — excluded |
| 25 m | ≈21.7% | 2328–2353 m | under overhead cover terrain reads 31.7% at 587–612 m across terrain that holds no road surface (dense canopy, no bench) — excluded |
| 50 m | ≈16.7% | 3294–3344 m | under overhead cover terrain reads 25.2% at 563–613 m across terrain that holds no road surface (dense canopy, no bench) — excluded |
| 100 m | ≈15.8% | 3248–3348 m | under overhead cover terrain reads 20.6% at 565–665 m across terrain that holds no road surface (dense canopy, no bench) — excluded |
may_start_earlierdescends_at_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/wales/dtm_1m/wg_del_1_319339_20200326dtm.tif",
"data/cache/wales/dtm_1m/wg_del_1_319340_20200326dtm.tif",
"data/cache/wales/dtm_1m/wg_del_1_319341_20200326dtm.tif",
"data/cache/wales/dtm_1m/wg_del_1_319342_20200326dtm.tif",
"data/cache/wales/dtm_1m/wg_del_1_319343_20200326dtm.tif",
"data/cache/wales/dtm_1m/wg_del_1_320339_20200326dtm.tif",
"data/cache/wales/dtm_1m/wg_del_1_320340_20200326dtm.tif",
"data/cache/wales/dtm_1m/wg_del_1_320341_20200326dtm.tif",
"data/cache/wales/dtm_1m/wg_del_1_320342_20200326dtm.tif",
"data/cache/wales/dtm_1m/wg_del_1_320343_20200326dtm.tif"
],
"calculated_at": "2026-08-12T09:09:31+00:00",
"road_source": "OpenStreetMap (local PBF extract)",
"road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
"osm_pbf_path": "data/cache/pbf/wales-2026-08-11.osm.pbf",
"osm_snapshot": "2026-08-10T20:21:40Z",
"elevation_provider": "Welsh Government",
"elevation_dataset": "Welsh Government LiDAR 1m DTM (2020-2023)",
"elevation_licence": "Open Government Licence v3 \u2014 \u00a9 Crown copyright Welsh Government",
"elevation_catalogue_layer": "geonode:welsh_government_lidar_tile_catalogue_2020_2023",
"elevation_tile_ids": [
"wg_del_1_319339_20200326dtm.tif",
"wg_del_1_319340_20200326dtm.tif",
"wg_del_1_319341_20200326dtm.tif",
"wg_del_1_319342_20200326dtm.tif",
"wg_del_1_319343_20200326dtm.tif",
"wg_del_1_320339_20200326dtm.tif",
"wg_del_1_320340_20200326dtm.tif",
"wg_del_1_320341_20200326dtm.tif",
"wg_del_1_320342_20200326dtm.tif",
"wg_del_1_320343_20200326dtm.tif"
],
"elevation_capture_dates": [
"26-03-2020"
],
"climb_origin": "discovered",
"notes": "Coarse pass: max 15.8% over 200 m (Terrain 50), gain 272.6 m over 5970 m way. EXTENDED by graph walk: +1 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 2 overlapping proposal(s): discovered-lane-52-9701-3-1801, willow-street ADOPTED (notable slice 2026-08-11): big-gain. AUTO-NAMED from gazetteer (hypothesis, unreviewed): was 'Discovered lane (52.9659, -3.1943)'.",
"renamed": "2026-08-13: 'Barber's Hill' adopted over auto-name 'Berwyn to Blaen-Bache Dingle' \u2014 1950 National HC venue evidence; human decision"
}