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Port de Pailhères from Ascou

14739.7 m · net rise 1013.1 m · total ascent 1027.8 m · overall 6.9% · evidence quality B (good) · Ascou · Ariège ·

Shape: sustained — 33% of the climbing sits in a quarter of the distance; longest continuous stretch at 10%+ is 87 m.

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

Gradient ladder what do windows mean?

WindowMaximumLocated at
2 m (diagnostic)≈13%4212–4214 munder overhead cover terrain reads 111.8% at 3808–3810 m across a structure — excluded
3 m (diagnostic)≈13%5690–5693 munder overhead cover terrain reads 99.4% at 2493–2496 m across a structure — excluded
5 m≈13%5688–5693 munder overhead cover terrain reads 78.3% at 2492–2497 m across a structure — excluded
10 m≈12%5687–5697 munder overhead cover terrain reads 39.8% at 2489–2499 m across a structure — excluded
20 m≈12.2%5682–5702 munder overhead cover terrain reads 20.1% at 2489–2509 m across a structure — excluded
25 m≈12.1%5682–5707 munder overhead cover terrain reads 16.0% at 2489–2514 m across a structure — excluded
50 m≈11.7%5665–5715 munder overhead cover
100 m≈10.9%5620–5720 munder overhead cover

may continue beyond end 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)

Port de Pailhères from Ascou 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).

Port de Pailhères from Ascou elevation profile
Port de Pailhères from Ascou 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
TilesE606-N6180, E607-N6180, E608-N6180, E608-N6181, E609-N6180, E609-N6181, E610-N6180, E610-N6181, E611-N6180, E612-N6180, E612-N6181, E613-N6180, E613-N6181, E613-N6182, E614-N6181, E614-N6182, E615-N6181, E615-N6182, E616-N6181, E616-N6182, E617-N6181, E617-N6182
Road centrelineOpenStreetMap (local PBF extract)
Quality statusevidence quality B; caveated windows: canopy or structure, structure excluded, structure excluded min
AnalysisOCL 0.1.0, analysis 0.1.0, run fr-pyr3, calculated 2026-09-20

Provenance

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  "calculated_at": "2026-09-20T07:14:51+00:00",
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  "climb_origin": "named-pass",
  "structure_own_ways": 12,
  "structure_mask_ranges_m": [
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    "stations_resolved": 596,
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  "license_url": "https://howsteep.org/licensing"
}