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

Oliver Avenue

636.8 m · net rise 32.3 m · total ascent 49.2 m · overall 5.1% · evidence quality B (good) · Bentleyville · Pennsylvania · share

Shape: stepped — 45% of the climbing sits in a quarter of the distance; longest continuous stretch at 10%+ is 127 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 the state road inventory, OpenStreetMap and the point-cloud evidence for a graded road bed, 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.

Gradient ladder what do windows mean?

Window	Maximum	Located at
2 m (diagnostic)	≈22%	606–608 m	under overhead cover terrain reads 121.2% at 22–24 m across a structure — excluded
3 m (diagnostic)	≈21%	589–592 m	under overhead cover terrain reads 98.5% at 22–25 m across a structure — excluded
5 m	≈21%	587–592 m	under overhead cover terrain reads 66.9% at 21–26 m across a structure — excluded
10 m	≈21%	586–596 m	under overhead cover terrain reads 34.2% at 20–30 m across a structure — excluded
20 m	20.7%	588–608 m
25 m	20.8%	587–612 m
50 m	20.3%	571–621 m
100 m	18.5%	531–631 m

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 each state's road inventory.

Pending human review: the laser ground model dips and climbs back between 413 and 589 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.

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%

Oliver Avenue 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	USGS 3DEP (The National Map) — USGS 3DEP 1 m DEM, PA_WesternPA_2019_D20 (collected 2020)
Resolution / CRS	1.0 m grid, EPSG:26917; sampled every 1.0 m, bilinear interpolation
Tiles	x58y445
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 pa-run4-260907, calculated 2026-09-07

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:26917",
  "elevation_resolution_m": 1.0,
  "elevation_tiles": [
    "data/cache/usa/pa-west/USGS_1M_17_x58y445_PA_WesternPA_2019_D20.tif"
  ],
  "calculated_at": "2026-09-07T13:55:24+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/pennsylvania-2026-09-07-batch-band1.osm.pbf",
  "osm_snapshot": "",
  "run_id": "pa-run4-260907",
  "elevation_provider": "USGS 3DEP (The National Map)",
  "elevation_licence": "Public domain \u2014 USGS 3DEP 1 m DEM, courtesy of the U.S. Geological Survey",
  "elevation_dataset": "USGS 3DEP 1 m DEM, PA_WesternPA_2019_D20 (collected 2020)",
  "elevation_tile_ids": [
    "x58y445"
  ],
  "climb_origin": "discovered",
  "canopy_check": "unavailable \u2014 EPT corridor failed: PA_WesternPA_2019_D20: HTTP Error 404: Not Found",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
}