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

Lane near Grüt

Paved · listed, not ranked

630.1 m · net rise 71.3 m · overall 11.3% · evidence quality A (high) · Sachseln · Obwalden

Shape: sustained — 33% of the climbing sits in a quarter of the distance; longest continuous stretch at 10%+ is 120 m.

Found purely from mapping and LiDAR data, and not yet matched against books, race records or lists — it may be well known to locals under a name we've never heard. It was cross-checked against swisstopo’s swissTLM3D road model, OpenStreetMap and a second terrain model, but a discovery can still be an artifact of the terrain model or the map. Treat it as a well-evidenced hypothesis until someone has ridden it. If you know this road, tell us what you found — photographs, corrections and local knowledge all welcome; the map links below let you scout it first.

Lane near Grüt (Sachseln, Obwalden) is 630.1 m long at 11.3% overall; its steepest 25 m averages 20.4% and its steepest 100 m 16.6%, measured from swisstopo's swissALTI3D 0.5 m LiDAR along the mapped road centreline.

Gradient ladder what do windows mean?

Window	Maximum	Located at
2 m (diagnostic)	41%	460–462 m
3 m (diagnostic)	38%	460–463 m
5 m	30%	459–464 m
10 m	22%	530–540 m
20 m	20.8%	520–540 m
25 m	20.4%	518–543 m
50 m	18.9%	498–548 m
100 m	16.6%	460–560 m

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 swisstopo's swissTLM3D road model.

Access: Listed 2026-10-22 (access-end): the steepest 25 m sits on the unnamed access at the end of the line, with 4 building(s) within 40 m of the line end — a works/farm/house drive, not a public road; listed, access: review, until a person looks. Nothing is retired. The published steepest 25 m is unchanged. Before: ranked; note: Ranked 2026-10-05: swissTLM3D carries 100% of the route as public road (0% restricted), which answers the OSM audit question (unnamed service way, untagged surface).

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%

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

Lane near Grüt 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).

Measurement card

Elevation	swisstopo swissALTI3D — swissALTI3D 0.5 m DTM (Federal Office of Topography swisstopo)
Resolution / CRS	0.5 m grid, EPSG:2056; sampled every 1.0 m, bilinear interpolation
Tiles	2658-1189, 2659-1189
Road centreline	OpenStreetMap (local PBF extract)
Quality status	evidence quality A; no review flags; no caveated windows
Analysis	OCL 0.1.0, analysis 0.1.0, run ch-run7-260911, calculated 2026-09-11

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:2056",
  "elevation_resolution_m": 0.5,
  "elevation_tiles": [
    "data/cache/ch/swissalti3d_2022_2658-1189_0.5_2056_5728.tif",
    "data/cache/ch/swissalti3d_2022_2659-1189_0.5_2056_5728.tif"
  ],
  "calculated_at": "2026-09-11T03:01:12+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/switzerland-2026-09-10-batch.osm.pbf",
  "osm_snapshot": "",
  "run_id": "ch-run7-260911",
  "elevation_provider": "swisstopo swissALTI3D",
  "elevation_licence": "swisstopo open government data (OGD): free use, attribution '\u00a9 swisstopo' \u2014 https://www.swisstopo.admin.ch/en/terms-and-conditions",
  "elevation_dataset": "swissALTI3D 0.5 m DTM (Federal Office of Topography swisstopo)",
  "elevation_tile_ids": [
    "2658-1189",
    "2659-1189"
  ],
  "climb_origin": "discovered",
  "canopy_check": "unavailable \u2014 no surface model (DSM or point cloud) registered for this coverage",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
}