Silvretta Hochalpenstraße (east side)
6928.7 m · net rise 306.2 m · total ascent 342.8 m · overall 4.4% · evidence quality B (good) · Galtür · Tirol · share
Shape: stepped — 50% of the climbing sits in a quarter of the distance; longest continuous stretch at 10%+ is 303 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?
| Window | Maximum | Located at | |
|---|---|---|---|
| 2 m (diagnostic) | ≈14% | 5569–5571 m | under overhead cover terrain reads 96.9% at 2375–2377 m across a structure — excluded |
| 3 m (diagnostic) | ≈13% | 5569–5572 m | under overhead cover terrain reads 95.9% at 2374–2377 m across a structure — excluded |
| 5 m | ≈13% | 5574–5579 m | under overhead cover terrain reads 89.9% at 2374–2379 m across a structure — excluded |
| 10 m | ≈13% | 5569–5579 m | under overhead cover terrain reads 59.5% at 3749–3759 m across a structure — excluded |
| 20 m | ≈12.7% | 5566–5586 m | under overhead cover terrain reads 33.3% at 4682–4702 m across a structure — excluded |
| 25 m | ≈12.7% | 5560–5585 m | under overhead cover terrain reads 28.6% at 4682–4707 m across a structure — excluded |
| 50 m | ≈12.6% | 5529–5579 m | under overhead cover terrain reads 19.7% at 4689–4739 m across a structure — excluded |
| 100 m | ≈12.3% | 5492–5592 m | under overhead cover terrain reads 15.7% at 4689–4789 m across a structure — excluded |
descends at 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: GIP.at, Austria's official transport graph records no surface for this road; the map may tell you more.
Access: Toll road: illwerke vkw charges motor vehicles; bicycles free (operator's page). Ranked 2026-09-15 through the fame door (a recognition entry, climbs/recognition.yaml): at 306 m of gain the east ramp clears no measurement door, and it is published because the Silvretta Hochalpenstraße is a recognised climb, not because of its gradient.
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
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 © 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
| Elevation | BEV ALS DTM 1 m — ALS DTM Höhenraster 1 m (Bundesamt für Eich- und Vermessungswesen with the Länder), EPSG:3035 |
|---|---|
| Resolution / CRS | 1.0 m grid, EPSG:3035; sampled every 1.0 m, bilinear interpolation |
| Tiles | E4327-N2644, E4327-N2645, E4328-N2644, E4328-N2645, E4329-N2644, E4329-N2645, E4330-N2645, E4330-N2646, E4330-N2647, E4331-N2646, E4331-N2647, E4331-N2648, E4332-N2647, E4332-N2648 |
| Road centreline | OpenStreetMap (local PBF extract) |
| Quality status | evidence quality B; caveated windows: structure excluded |
| Analysis | OCL 0.1.0, analysis 0.1.0, run at-passes-260915, calculated 2026-09-15 |
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_E4327-N2644.tif",
"data/cache/at/bev-als_dtm_E4327-N2645.tif",
"data/cache/at/bev-als_dtm_E4328-N2644.tif",
"data/cache/at/bev-als_dtm_E4328-N2645.tif",
"data/cache/at/bev-als_dtm_E4329-N2644.tif",
"data/cache/at/bev-als_dtm_E4329-N2645.tif",
"data/cache/at/bev-als_dtm_E4330-N2645.tif",
"data/cache/at/bev-als_dtm_E4330-N2646.tif",
"data/cache/at/bev-als_dtm_E4330-N2647.tif",
"data/cache/at/bev-als_dtm_E4331-N2646.tif",
"data/cache/at/bev-als_dtm_E4331-N2647.tif",
"data/cache/at/bev-als_dtm_E4331-N2648.tif",
"data/cache/at/bev-als_dtm_E4332-N2647.tif",
"data/cache/at/bev-als_dtm_E4332-N2648.tif"
],
"calculated_at": "2026-09-15T05:42:42+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": [
"E4327-N2644",
"E4327-N2645",
"E4328-N2644",
"E4328-N2645",
"E4329-N2644",
"E4329-N2645",
"E4330-N2645",
"E4330-N2646",
"E4330-N2647",
"E4331-N2646",
"E4331-N2647",
"E4331-N2648",
"E4332-N2647",
"E4332-N2648"
],
"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": [
[
2365.7,
2395.7
],
[
2365.5,
2395.5
],
[
3742.8,
3772.8
],
[
3721.7,
3751.7
],
[
1207.4,
1237.4
],
[
4656.2,
4686.2
],
[
4679.5,
4709.5
]
],
"mask_basin_extension_m": 6.0,
"license": "ODbL-1.0",
"license_url": "https://howsteep.org/licensing"
}