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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Sognefjellet from Ytri

27432.7 m · net rise 1382.0 m · total ascent 1625.6 m · overall 5.0% · evidence quality B (good) · Luster · Vestland

Shape: sustained — 41% of the climbing sits in a quarter of the distance; longest continuous stretch at 10%+ is 401 m.

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

Gradient ladder what do windows mean?

WindowMaximumLocated at
2 m (diagnostic)≈44%25361–25363 munder overhead cover terrain reads 210.9% at 8554–8556 m across a structure — excluded
3 m (diagnostic)≈40%25360–25363 munder overhead cover terrain reads 182.9% at 9650–9653 m across a structure — excluded
5 m≈30%19550–19555 munder overhead cover terrain reads 137.0% at 9649–9654 m across a structure — excluded
10 m≈28%19482–19492 munder overhead cover terrain reads 74.8% at 9648–9658 m across a structure — excluded
20 m≈20.4%19473–19493 munder overhead cover terrain reads 43.3% at 8235–8255 m across a structure — excluded
25 m≈18.8%19530–19555 munder overhead cover terrain reads 38.5% at 8230–8255 m across a structure — excluded
50 m≈14.0%19443–19493 munder overhead cover terrain reads 25.0% at 8205–8255 m across a structure — excluded
100 m≈13.0%13651–13751 munder overhead cover terrain reads 17.8% at 8155–8255 m across a structure — excluded

may start earliermay 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 NVDB, Norway's National Road Database.

Access: Ranked 2026-10-05 (D27, road authority): NVDB carries 100% of the route as public road (0% restricted), which answers the OSM audit question (barrier gate without an access tag). A barrier gate without an access tag sits on the route; gates on public roads are usually seasonal — check on the ground.

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%

Route line = the road surface as the LiDAR survey finds it. Basemap roads are for orientation and may sit a few metres off.

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

Sognefjellet from Ytri 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).

Sognefjellet from Ytri elevation profile
Sognefjellet from Ytri rolling gradient profile
 

Measurement card

ElevationKartverket NHM DTM 1 m (laser-covered ground only) — Nasjonal høydemodell (NHM) DTM, 1 m, EPSG:25833, NN2000 (Kartverket), served by the hoydedata.no ImageServer; ground without a laser project is a coarser resampled product and is never measured
Resolution / CRS1.0 m grid, EPSG:25833; sampled every 1.0 m, bilinear interpolation
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Road centrelineOpenStreetMap (local PBF extract)
Quality statusevidence quality B; caveated windows: canopy or structure, structure excluded, structure excluded min, suppression unstable
AnalysisOCL 0.1.0, analysis 0.1.0, run no-b06, calculated 2026-10-03

Provenance

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    "E124000-N6844000": 0.052156,
    "E124500-N6844000": 0.079688,
    "E125000-N6844000": 0.169852,
    "E125500-N6844500": 0.014824,
    "E126000-N6844500": 0.091076
  },
  "nhm_retrieved_at": "2026-10-03T19:51:57Z",
  "nhm_note": "laser projects overlapping the route's cells; the mosaic draws on them by its own priority and which project supplied which pixel is not recorded",
  "climb_origin": "named-pass",
  "named_pass": "Sognefjellet",
  "seam_filled_samples": {
    "count": 0,
    "distances_m": []
  },
  "seam_filled_in_maximum": false,
  "structure_own_ways": 18,
  "tunnel_check": "osm tunnel=* ways on 18 own way(s)",
  "tunnel_ranges_m": [],
  "underground_fraction": 0.0,
  "structure_mask_ranges_m": [
    [
      9653.0,
      9666.5
    ],
    [
      8934.2,
      8953.8
    ],
    [
      8557.1,
      8569.3
    ],
    [
      3306.8,
      3316.7
    ],
    [
      3419.7,
      3460.0
    ],
    [
      25389.6,
      25397.1
    ]
  ],
  "mask_basin_extension_m": 50.0,
  "suppression_unstable": [
    20.0
  ],
  "carriageway": {
    "stations": 1104,
    "stations_resolved": 1104,
    "width_median_m": 6.25,
    "width_p10_m": 5.0,
    "width_min_m": 0.5,
    "width_max_m": 12.0,
    "bounded_share": 0.274,
    "unbounded_share": 0.726,
    "confidence_median": 0.0,
    "width_median_bounded_m": 6.25,
    "window_m": [
      19530.0,
      19555.0
    ],
    "width_at_max25_m": 6.0,
    "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",
    "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": 1104,
      "stations_resolved": 1104,
      "width_median_m": 9.5,
      "width_p10_m": 6.5,
      "width_min_m": 1.0,
      "width_max_m": 12.0,
      "bounded_share": 0.549,
      "unbounded_share": 0.451,
      "confidence_median": 0.951,
      "width_median_bounded_m": 8.38,
      "window_m": [
        19530.0,
        19555.0
      ],
      "width_at_max25_m": 8.62,
      "window_stations": 6,
      "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"
}