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Lane near Rhyd-Meirionnydd

4090.0 m · net rise 116.5 m · total ascent 154.7 m · overall 2.8% · confidence: good

Shape: sustained — 34% of the climbing sits in a quarter of the distance; longest continuous stretch at 10%+ is 100 m.

Documented on the ground — tag: 25%. 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)	21%	1599–1601 m
3 m (diagnostic)	20%	1600–1603 m
5 m	17%	1599–1604 m
10 m	16%	1584–1594 m
20 m	14.7%	1584–1604 m
25 m	13.9%	1577–1602 m
50 m	≈12.6%	2649–2699 m	under overhead cover
100 m	12.3%	1584–1684 m

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

Lane near Rhyd-Meirionnydd LiDAR hillshade map with contours

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_23_259283_20220117dtm.tif",
    "data/cache/wales/dtm_1m/wg_del_23_259284_20220117dtm.tif",
    "data/cache/wales/dtm_1m/wg_del_23_260283_20220117dtm.tif",
    "data/cache/wales/dtm_1m/wg_del_23_260284_20220117dtm.tif",
    "data/cache/wales/dtm_1m/wg_del_23_260285_20220117dtm.tif",
    "data/cache/wales/dtm_1m/wg_del_23_260286_20220117dtm.tif",
    "data/cache/wales/dtm_1m/wg_del_29_259285_20220319dtm.tif",
    "data/cache/wales/dtm_1m/wg_del_29_259286_20220319dtm.tif",
    "data/cache/wales/dtm_1m/wg_del_29_259287_20220319dtm.tif",
    "data/cache/wales/dtm_1m/wg_del_29_259288_20220319dtm.tif",
    "data/cache/wales/dtm_1m/wg_del_29_260287_20220319dtm.tif",
    "data/cache/wales/dtm_1m/wg_del_29_260288_20220319dtm.tif"
  ],
  "calculated_at": "2026-08-13T02:09:07+00:00",
  "road_source": "extended-proposals-wales-routes/lane-near-rhyd-meirionnydd.geojson",
  "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_23_259283_20220117dtm.tif",
    "wg_del_23_259284_20220117dtm.tif",
    "wg_del_23_260283_20220117dtm.tif",
    "wg_del_23_260284_20220117dtm.tif",
    "wg_del_23_260285_20220117dtm.tif",
    "wg_del_23_260286_20220117dtm.tif",
    "wg_del_29_259285_20220319dtm.tif",
    "wg_del_29_259286_20220319dtm.tif",
    "wg_del_29_259287_20220319dtm.tif",
    "wg_del_29_259288_20220319dtm.tif",
    "wg_del_29_260287_20220319dtm.tif",
    "wg_del_29_260288_20220319dtm.tif"
  ],
  "elevation_capture_dates": [
    "17-01-2022",
    "19-03-2022"
  ],
  "route_summit_trim_m": 531.2,
  "route_summit_trim_loss_m": 61.4,
  "climb_origin": "osm_incline",
  "notes": "Promoted automatically from triage verdict=validated. Named from nearest OSM place node (Rhyd-Meirionnydd); originally unnamed at (52.4559, -4.0576). 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."
}