Padarn Crescent
220.5 m · net rise 10.6 m · total ascent 13.4 m · overall 4.8% · confidence: high
Shape: stepped — 60% of the climbing sits in a quarter of the distance; longest continuous stretch at 10%+ is 51 m.
Documented on the ground — sign: 16% (2024). Signs get repainted and tags get retagged, so the date is part of the fact; not yet matched against any cycling list.
Gradient ladder what do windows mean?
| Window | Maximum | Located at | |
|---|---|---|---|
| 2 m (diagnostic) | 24% | 8–10 m | |
| 3 m (diagnostic) | 23% | 7–10 m | |
| 5 m | 22% | 7–12 m | |
| 10 m | 21% | 7–17 m | |
| 20 m | 19.6% | 7–27 m | |
| 25 m | 19.3% | 7–32 m | |
| 50 m | 15.7% | 3–53 m | |
| 100 m | 8.7% | 3–103 m |
may_start_earlier 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
Reported values vs. measurement
| Source | Claim | Evidence | Best-matching window |
|---|---|---|---|
| Road sign (Padarn Crescent at Quebec Road) | 16% | road_sign | 50 m (+0.3 pp) |
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_29_259281_20220319dtm.tif"
],
"calculated_at": "2026-08-20T23:51:17+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_29_259281_20220319dtm.tif"
],
"elevation_capture_dates": [
"19-03-2022"
],
"climb_origin": "discovered",
"notes": "ADOPTED 2026-08-20: sign-validated (Peter's Street View find; seeded from the sighting \u2014 the coarse pass misses short steep residentials, Terrain 50 smooths them under the seed bar). First route born via extend --openroads (100% OR-snapped). Measured max50 15.7% vs the posted 16%; shorter windows run above the sign (max25 19.3%, max5 22.2%). The Cefn Llan pattern, minus the sign upgrade."
}