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Col de Labays from Arette

17337.6 m · net rise 1022.7 m · total ascent 1068.6 m · overall 5.9% · evidence quality U (needs confirmation) · Arette · Pyrénées-Atlantiques ·

Shape: sustained — 40% of the climbing sits in a quarter of the distance; longest continuous stretch at 10%+ is 275 m.

Not yet matched against documented climbs — the measurement stands on its own.

needs review short window divergence — treat short-window maxima here as provisional.

Gradient ladder what do windows mean?

WindowMaximumLocated at
2 m (diagnostic)≈39%13524–13526 munder overhead cover terrain reads 251.7% at 12969–12971 m across a structure — excluded
3 m (diagnostic)≈38%3039–3042 munder overhead cover terrain reads 181.3% at 12968–12971 m across a structure — excluded
5 m≈34%3038–3043 munder overhead cover terrain reads 113.1% at 12968–12973 m across a structure — excluded
10 m≈18%3033–3043 munder overhead cover terrain reads 62.2% at 12968–12978 m across a structure — excluded
20 m≈16.6%8942–8962 munder overhead cover terrain reads 36.8% at 12968–12988 m across a structure — excluded
25 m≈16.5%8942–8967 munder overhead cover terrain reads 31.5% at 12968–12993 m across a structure — excluded
50 m≈15.7%8925–8975 munder overhead cover terrain reads 20.5% at 12968–13018 m across a structure — excluded
100 m≈14.9%8873–8973 munder overhead cover

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.

Surface: paved throughout, according to BD TOPO®, IGN's national topographic database.

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 ·

Route colour = gradient over a 25 m window: <10% 10–20% 20–25% ≥25%

  © OpenStreetMap contributors · topo tiles © OpenTopoMap (CC-BY-SA) · vector tiles OpenFreeMap · aerial imagery © IGN, BD ORTHO® (Licence Ouverte Etalab 2.0)

Col de Labays from Arette LiDAR hillshade map with contours

Profile

The map, profile and gradient chart share one position — move your pointer over them and the marker follows. Colors are the gradient bands; the shaded span is the steepest 25 m. Any 25 m figure is good to about a point either way (why).

Col de Labays from Arette elevation profile
Col de Labays from Arette rolling gradient profile
 

Measurement card

ElevationIGN LiDAR HD MNT 0.5 m — LiDAR HD — MNT (sol) et MNS (surface), 0,50 m (Institut national de l'information géographique et forestière), RGF93 / Lambert-93 EPSG:2154, altitudes IGN69
Resolution / CRS0.5 m grid, EPSG:2154; sampled every 1.0 m, bilinear interpolation
TilesE393-N6223, E393-N6224, E393-N6225, E394-N6218, E394-N6219, E394-N6220, E394-N6221, E394-N6222, E394-N6223, E394-N6225, E394-N6226, E395-N6218, E395-N6219, E395-N6226, E395-N6227, E396-N6227, E396-N6228, E397-N6227, E397-N6228
Road centrelineOpenStreetMap (local PBF extract)
Quality statusevidence quality U; review flags: short window divergence
AnalysisOCL 0.1.0, analysis 0.1.0, run fr-pyr1, calculated 2026-09-20

Provenance

{
  "analysis_version": "0.1.0",
  "run_manifest": {
    "manifest_version": "1",
    "code_git_sha": "06fa4c370391597f015858e97dcf01ca2f5b3640",
    "code_git_dirty": "false",
    "analysis_version": "0.1.0",
    "analysis_config_digest": "sha256:0048c2bbb24ab95e",
    "python": "3.14.4",
    "numpy": "2.5.3",
    "rasterio": "1.5.1",
    "pyproj": "3.8.0",
    "laspy": "2.7.0",
    "shapely": "2.1.2",
    "pyosmium": "4.3.1",
    "libosmium": "2.23.1",
    "gdal": "3.12.4",
    "proj": "9.8.1",
    "run_id": "fr-pyr1",
    "road_pbf": "block-batch-fr-pyr1.osm.pbf",
    "region_key": "france",
    "crs": "EPSG:2154",
    "elevation_provider_key": "ign-lidarhd",
    "tile_index": "wms-grid",
    "authority": "bdtopo",
    "registry_pbf": "france-vosges-2026-09-16.osm.pbf",
    "tile_index_snapshot": "sha256:c54ac68b3f57b41b"
  },
  "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:2154",
  "elevation_resolution_m": 0.5,
  "elevation_tiles": [
    "data/cache/fr/ign-lidarhd_dtm_E393-N6223_0m5@21LHD1FR-2025-03-21.tif",
    "data/cache/fr/ign-lidarhd_dtm_E393-N6224_0m5@21LHD1FR-2025-03-21.tif",
    "data/cache/fr/ign-lidarhd_dtm_E393-N6225_0m5@21LHD1FR-2025-03-21.tif",
    "data/cache/fr/ign-lidarhd_dtm_E394-N6218_0m5@21LHD1FR-2025-03-21.tif",
    "data/cache/fr/ign-lidarhd_dtm_E394-N6219_0m5@21LHD1FR-2025-03-21.tif",
    "data/cache/fr/ign-lidarhd_dtm_E394-N6220_0m5@21LHD1FR-2025-03-21.tif",
    "data/cache/fr/ign-lidarhd_dtm_E394-N6221_0m5@21LHD1FR-2025-03-21.tif",
    "data/cache/fr/ign-lidarhd_dtm_E394-N6222_0m5@21LHD1FR-2025-03-21.tif",
    "data/cache/fr/ign-lidarhd_dtm_E394-N6223_0m5@21LHD1FR-2025-03-21.tif",
    "data/cache/fr/ign-lidarhd_dtm_E394-N6225_0m5@21LHD1FR-2025-03-21.tif",
    "data/cache/fr/ign-lidarhd_dtm_E394-N6226_0m5@21LHD1FR-2025-03-21.tif",
    "data/cache/fr/ign-lidarhd_dtm_E395-N6218_0m5@21LHD1FR-2025-03-21.tif",
    "data/cache/fr/ign-lidarhd_dtm_E395-N6219_0m5@21LHD1FR-2025-03-21.tif",
    "data/cache/fr/ign-lidarhd_dtm_E395-N6226_0m5@21LHD1FR-2025-03-21.tif",
    "data/cache/fr/ign-lidarhd_dtm_E395-N6227_0m5@21LHD1FR-2025-03-21.tif",
    "data/cache/fr/ign-lidarhd_dtm_E396-N6227_0m5@21LHD1FR-2025-03-21.tif",
    "data/cache/fr/ign-lidarhd_dtm_E396-N6228_0m5@21LHD1FR-2025-03-21.tif",
    "data/cache/fr/ign-lidarhd_dtm_E397-N6227_0m5@21LHD1FR-2025-03-21.tif",
    "data/cache/fr/ign-lidarhd_dtm_E397-N6228_0m5@21LHD1FR-2025-03-21.tif"
  ],
  "calculated_at": "2026-09-20T06:25:24+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-pyr1.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-pyr1",
  "elevation_provider": "IGN LiDAR HD MNT 0.5 m",
  "elevation_licence": "Licence Ouverte / Open Licence 2.0 (Etalab) \u2014 \u00a9 IGN, LiDAR HD (MNT/MNS), data.geopf.fr; reproduction autoris\u00e9e avec mention de la source et de la date",
  "elevation_dataset": "LiDAR HD \u2014 MNT (sol) et MNS (surface), 0,50 m (Institut national de l'information g\u00e9ographique et foresti\u00e8re), RGF93 / Lambert-93 EPSG:2154, altitudes IGN69",
  "elevation_vertical_datum": "IGN69",
  "elevation_tile_ids": [
    "E393-N6223",
    "E393-N6224",
    "E393-N6225",
    "E394-N6218",
    "E394-N6219",
    "E394-N6220",
    "E394-N6221",
    "E394-N6222",
    "E394-N6223",
    "E394-N6225",
    "E394-N6226",
    "E395-N6218",
    "E395-N6219",
    "E395-N6226",
    "E395-N6227",
    "E396-N6227",
    "E396-N6228",
    "E397-N6227",
    "E397-N6228"
  ],
  "elevation_blocks": [
    "21LHD1FR@2025-03-21"
  ],
  "ign_dalles": [
    "LHD_FXX_0393_6224_MNT_O_0M50_LAMB93_IGN69",
    "LHD_FXX_0393_6225_MNT_O_0M50_LAMB93_IGN69",
    "LHD_FXX_0393_6226_MNT_O_0M50_LAMB93_IGN69",
    "LHD_FXX_0394_6219_MNT_O_0M50_LAMB93_IGN69",
    "LHD_FXX_0394_6220_MNT_O_0M50_LAMB93_IGN69",
    "LHD_FXX_0394_6221_MNT_O_0M50_LAMB93_IGN69",
    "LHD_FXX_0394_6222_MNT_O_0M50_LAMB93_IGN69",
    "LHD_FXX_0394_6223_MNT_O_0M50_LAMB93_IGN69",
    "LHD_FXX_0394_6224_MNT_O_0M50_LAMB93_IGN69",
    "LHD_FXX_0394_6226_MNT_O_0M50_LAMB93_IGN69",
    "LHD_FXX_0394_6227_MNT_O_0M50_LAMB93_IGN69",
    "LHD_FXX_0395_6219_MNT_O_0M50_LAMB93_IGN69",
    "LHD_FXX_0395_6220_MNT_O_0M50_LAMB93_IGN69",
    "LHD_FXX_0395_6227_MNT_O_0M50_LAMB93_IGN69",
    "LHD_FXX_0395_6228_MNT_O_0M50_LAMB93_IGN69",
    "LHD_FXX_0396_6228_MNT_O_0M50_LAMB93_IGN69",
    "LHD_FXX_0396_6229_MNT_O_0M50_LAMB93_IGN69",
    "LHD_FXX_0397_6228_MNT_O_0M50_LAMB93_IGN69",
    "LHD_FXX_0397_6229_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
    "21LHD1FR"
  ],
  "ign_editions": [
    "2025-03-21"
  ],
  "ign_dsm_edition": {
    "LHD_FXX_0393_6224_MNT_O_0M50_LAMB93_IGN69": "2025-03-21",
    "LHD_FXX_0393_6225_MNT_O_0M50_LAMB93_IGN69": "2025-03-21",
    "LHD_FXX_0393_6226_MNT_O_0M50_LAMB93_IGN69": "2025-03-21",
    "LHD_FXX_0394_6219_MNT_O_0M50_LAMB93_IGN69": "2025-03-21",
    "LHD_FXX_0394_6220_MNT_O_0M50_LAMB93_IGN69": "2025-03-21",
    "LHD_FXX_0394_6221_MNT_O_0M50_LAMB93_IGN69": "2025-03-21",
    "LHD_FXX_0394_6222_MNT_O_0M50_LAMB93_IGN69": "2025-03-21",
    "LHD_FXX_0394_6223_MNT_O_0M50_LAMB93_IGN69": "2025-03-21",
    "LHD_FXX_0394_6224_MNT_O_0M50_LAMB93_IGN69": "2025-03-21",
    "LHD_FXX_0394_6226_MNT_O_0M50_LAMB93_IGN69": "2025-03-21",
    "LHD_FXX_0394_6227_MNT_O_0M50_LAMB93_IGN69": "2025-03-21",
    "LHD_FXX_0395_6219_MNT_O_0M50_LAMB93_IGN69": "2025-03-21",
    "LHD_FXX_0395_6220_MNT_O_0M50_LAMB93_IGN69": "2025-03-21",
    "LHD_FXX_0395_6227_MNT_O_0M50_LAMB93_IGN69": "2025-03-21",
    "LHD_FXX_0395_6228_MNT_O_0M50_LAMB93_IGN69": "2025-03-21",
    "LHD_FXX_0396_6228_MNT_O_0M50_LAMB93_IGN69": "2025-03-21",
    "LHD_FXX_0396_6229_MNT_O_0M50_LAMB93_IGN69": "2025-03-21",
    "LHD_FXX_0397_6228_MNT_O_0M50_LAMB93_IGN69": "2025-03-21",
    "LHD_FXX_0397_6229_MNT_O_0M50_LAMB93_IGN69": "2025-03-21"
  },
  "climb_origin": "named-pass",
  "structure_own_ways": "none \u2014 the route carried no way list; own decks unmasked",
  "carriageway": {
    "stations": 700,
    "stations_resolved": 700,
    "width_median_m": 7.75,
    "width_p10_m": 6.0,
    "width_min_m": 1.0,
    "width_max_m": 12.0,
    "bounded_share": 0.13,
    "unbounded_share": 0.87,
    "confidence_median": 0.0,
    "width_median_bounded_m": 7.25,
    "window_m": [
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      8967.0
    ],
    "width_at_max25_m": 7.75,
    "window_stations": 7,
    "single_track": false,
    "single_track_rule": "PROVISIONAL (2026-09-15): width_p10_m <= 3.0 m with bounded_share >= 0.6; recorded, not a rule",
    "status": "ok",
    "source": "dtm",
    "station_m": 25.0,
    "window_station_m": 5.0,
    "halfwidth_m": 6.0,
    "step_m": 0.25,
    "level_tol_m": 0.12,
    "break_min_m": 0.3,
    "stations_failed": 0,
    "hedge_to_hedge": {
      "stations": 700,
      "stations_resolved": 700,
      "width_median_m": 10.25,
      "width_p10_m": 5.73,
      "width_min_m": 0.0,
      "width_max_m": 12.0,
      "bounded_share": 0.369,
      "unbounded_share": 0.631,
      "confidence_median": 0.0,
      "width_median_bounded_m": 7.75,
      "window_m": [
        8942.0,
        8967.0
      ],
      "width_at_max25_m": 7.5,
      "window_stations": 7,
      "status": "ok",
      "source": "dsm",
      "station_m": 25.0,
      "window_station_m": 5.0,
      "halfwidth_m": 6.0,
      "step_m": 0.25,
      "level_tol_m": 0.5,
      "break_min_m": 0.3,
      "stations_failed": 0
    }
  },
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
}