LIVING SURVEY — measurements are reviewed continuously as new data and local evidence arrive. Seen a sign, a gate, or a better name? Submit an update no account needed · photos welcome via GitHub

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Col de Saint-Andrieu from La Motte

17178.9 m · net rise 399.6 m · total ascent 517.2 m · overall 2.3% · evidence quality B (good) · Trans-en-Provence · Var ·

Shape: sustained — 44% of the climbing sits in a quarter of the distance; longest continuous stretch at 10%+ is 28 m.

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

Gradient ladder what do windows mean?

WindowMaximumLocated at
2 m (diagnostic)≈27%42–44 munder overhead cover terrain reads 193.0% at 4526–4528 m across a structure — excluded
3 m (diagnostic)≈27%42–45 munder overhead cover terrain reads 178.7% at 4526–4529 m across a structure — excluded
5 m≈26%40–45 munder overhead cover terrain reads 129.8% at 4525–4530 m across a structure — excluded
10 m≈20%39–49 munder overhead cover terrain reads 66.0% at 4525–4535 m across a structure — excluded
20 m≈13.6%39–59 munder overhead cover terrain reads 34.1% at 4525–4545 m across a structure — excluded
25 m≈11.6%35–60 munder overhead cover terrain reads 27.7% at 4525–4550 m across a structure — excluded
50 m≈8.2%14155–14205 munder overhead cover terrain reads 17.4% at 39–89 m across a structure — excluded
100 m≈8.2%14152–14252 munder overhead cover terrain reads 9.2% at 32–132 m across a structure — excluded

descends at start 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.

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 Saint-Andrieu from La Motte 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 Saint-Andrieu from La Motte elevation profile
Col de Saint-Andrieu from La Motte 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
TilesE980-N6281, E980-N6282, E981-N6281, E981-N6282, E982-N6280, E982-N6281, E983-N6272, E983-N6273, E983-N6274, E983-N6279, E983-N6280, E983-N6281, E984-N6272, E984-N6273, E984-N6274, E984-N6275, E984-N6276, E984-N6278, E984-N6279, E985-N6275, E985-N6276, E985-N6277, E985-N6278, E985-N6279, E986-N6275, E986-N6276, E986-N6277, E986-N6278
Road centrelineOpenStreetMap (local PBF extract)
Quality statusevidence quality B; caveated windows: canopy or structure, structure excluded, structure excluded min, texture excluded
AnalysisOCL 0.1.0, analysis 0.1.0, run fr-pr-cols, calculated 2026-09-25

Provenance

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  "calculated_at": "2026-09-25T11:41:52+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
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  "climb_origin": "named-pass",
  "structure_own_ways": "none \u2014 the route carried no way list and no mapped way runs along it; own decks unmasked",
  "carriageway": {
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    "stations_resolved": 693,
    "width_median_m": 10.75,
    "width_p10_m": 8.75,
    "width_min_m": 1.25,
    "width_max_m": 12.0,
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    "unbounded_share": 0.912,
    "confidence_median": 0.0,
    "width_median_bounded_m": 9.0,
    "window_m": [
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    "width_at_max25_m": 11.25,
    "window_stations": 6,
    "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",
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    "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,
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      "stations": 693,
      "stations_resolved": 693,
      "width_median_m": 11.5,
      "width_p10_m": 7.75,
      "width_min_m": 0.0,
      "width_max_m": 12.0,
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      "unbounded_share": 0.815,
      "confidence_median": 0.0,
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      "width_at_max25_m": 8.0,
      "window_stations": 6,
      "status": "ok",
      "source": "dsm",
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      "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"
}