BETA — measurements and names under active refinement. Seen a sign, a gate, or a better name? Submit an update no account needed · photos welcome via GitHub

← all climbs

Lane near Whitesands Bay°

609.7 m · net rise 47.9 m · total ascent 52.2 m · overall 7.9% · confidence: good · Whitesands Bay · Dyfed ·

Shape: sustained — 39% of the climbing sits in a quarter of the distance; longest continuous stretch at 10%+ is 72 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 (51.9002, -5.2920)'). Corrections welcome.

Gradient ladder what do windows mean?

WindowMaximumLocated at
2 m (diagnostic)≈48%487–489 munder overhead cover terrain reads 67.8% at 237–239 m across a structure — excluded
3 m (diagnostic)≈42%487–490 munder overhead cover terrain reads 53.1% at 237–240 m across a structure — excluded
5 m≈33%487–492 munder overhead cover terrain reads 35.6% at 235–240 m across a structure — excluded
10 m30%486–496 m
20 m24.0%483–503 m
25 m22.1%478–503 m
50 m17.6%453–503 m
100 m14.2%449–549 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.

Measured, not vetted. This page records what the laser record shows about the road's shape — nothing more. Nobody has necessarily ridden or inspected this road for the survey, and a page here is not a recommendation and no guarantee that the road is open, surfaced, rideable or safe. Gates, private sections, missing rights of way and hazards do not show up in elevation data. Check access and conditions on the ground and make your own judgment.

Ridden it, or know better? Submit data for this climb no account needed ·

  © OpenStreetMap contributors · topo tiles © OpenTopoMap (CC-BY-SA) · vector tiles OpenFreeMap

Lane near Whitesands Bay LiDAR hillshade map with contours

Profile

Lane near Whitesands Bay elevation profile Lane near Whitesands Bay rolling gradient 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_35_173227_20220127dtm.tif"
  ],
  "calculated_at": "2026-08-12T09:07:26+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_35_173227_20220127dtm.tif"
  ],
  "elevation_capture_dates": [
    "27-01-2022"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 10.8% over 200 m (Terrain 50), gain 21.6 m over 190 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. ROAD-REVIEW: way 185665249: unnamed service way; way 185665249: service way, surface untagged ADOPTED (notable slice 2026-08-11): clean-steep. AUTO-NAMED from gazetteer (hypothesis, unreviewed): was 'Discovered lane (51.9002, -5.2920)'.",
  "naming_note": "auto-named from gazetteer (hypothesis, unreviewed); discovered as 'Discovered lane (51.9002, -5.2920)'",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing.html"
}