← all climbs

Silvretta Hochalpenstraße (west side)

12868.0 m · net rise 908.4 m · total ascent 944.1 m · overall 7.1% · evidence quality B (good) · Gaschurn · Vorarlberg · share

Shape: sustained — 33% of the climbing sits in a quarter of the distance; longest continuous stretch at 10%+ is 272 m.

Matches: Toll alpine roads (operators' pages), Wikipedia — Silvretta Hochalpenstraße — toll alpine road to the Bielerhöhe, operated by illwerke vkw (bicycles free) — Silvretta-Hochalpenstraße — toll road to the Bielerhöhe, open to the public since 1954; Wikipedia article.

Gradient ladder what do windows mean?

may start earlier 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: GIP.at, Austria's official transport graph records no surface for this road; the map may tell you more.

Pending human review: the laser ground model dips and climbs back between 3199 and 3365 m, at or close to the steepest 25 m. That is the shape of a bridge the map does not show — or of a real hollow in the road. The figure is published as measured and has not been adjusted.

Access: Held 2026-09-15: the Montafon ramp is closed (OSM access=no; mudslide 2024, reportedly to ~2030) and the steepest 25 m sits 20 m off the centreline; published for the record, not ranked.

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 · Share this climb

Load the interactive map

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

Topo (contours) Vector Aerial   © OpenStreetMap contributors · topo tiles © OpenTopoMap (CC-BY-SA) · vector tiles OpenFreeMap · aerial imagery © basemap.at (CC BY 4.0)

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).

 

Measurement card

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:3035",
  "elevation_resolution_m": 1.0,
  "elevation_tiles": [
    "data/cache/at/bev-als_dtm_E4325-N2644.tif",
    "data/cache/at/bev-als_dtm_E4325-N2645.tif",
    "data/cache/at/bev-als_dtm_E4325-N2646.tif",
    "data/cache/at/bev-als_dtm_E4325-N2647.tif",
    "data/cache/at/bev-als_dtm_E4325-N2648.tif",
    "data/cache/at/bev-als_dtm_E4326-N2644.tif",
    "data/cache/at/bev-als_dtm_E4326-N2645.tif",
    "data/cache/at/bev-als_dtm_E4326-N2647.tif",
    "data/cache/at/bev-als_dtm_E4326-N2648.tif",
    "data/cache/at/bev-als_dtm_E4326-N2649.tif",
    "data/cache/at/bev-als_dtm_E4327-N2644.tif",
    "data/cache/at/bev-als_dtm_E4327-N2645.tif"
  ],
  "calculated_at": "2026-09-15T05:41:42+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/austria-2026-09-11-batch-at-passes.osm.pbf",
  "osm_snapshot": "",
  "run_id": "at-passes-260915",
  "elevation_provider": "BEV ALS DTM 1 m",
  "elevation_licence": "Creative Commons Attribution 4.0 (CC BY 4.0) \u2014 \u00a9 BEV / L\u00e4nder, data.gv.at",
  "elevation_dataset": "ALS DTM H\u00f6henraster 1 m (Bundesamt f\u00fcr Eich- und Vermessungswesen with the L\u00e4nder), EPSG:3035",
  "elevation_tile_ids": [
    "E4325-N2644",
    "E4325-N2645",
    "E4325-N2646",
    "E4325-N2647",
    "E4325-N2648",
    "E4326-N2644",
    "E4326-N2645",
    "E4326-N2647",
    "E4326-N2648",
    "E4326-N2649",
    "E4327-N2644",
    "E4327-N2645"
  ],
  "elevation_blocks": [
    "N2600000E4300000@2022-09-15"
  ],
  "climb_origin": "named-pass",
  "structure_own_ways": "none \u2014 the route carried no way list; own decks unmasked",
  "structure_mask_ranges_m": [
    [
      3587.8,
      3617.8
    ],
    [
      3600.1,
      3630.1
    ],
    [
      3600.3,
      3630.3
    ],
    [
      3600.4,
      3630.4
    ],
    [
      3618.2,
      3648.2
    ],
    [
      1522.6,
      1552.6
    ],
    [
      1533.6,
      1563.6
    ],
    [
      675.2,
      705.2
    ],
    [
      685.1,
      715.1
    ],
    [
      6284.1,
      6314.1
    ],
    [
      6259.7,
      6289.7
    ],
    [
      7211.4,
      7241.4
    ]
  ],
  "mask_basin_extension_m": 58.0,
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
}