Appalachian Gap (east side)
5336.4 m · net rise 408.3 m · total ascent 418.4 m · overall 7.7% · confidence: good · Vermont · share
Shape: sustained — 34% of the climbing sits in a quarter of the distance; longest continuous stretch at 10%+ is 468 m.
Matches: BUMPS / Allen Clark Memorial Hill Climb — 2026 BUMPS calendar (Waitsfield, VT) - VT-17 east ascent to Appalachian Gap.
Gradient ladder what do windows mean?
| Window | Maximum | Located at | |
|---|---|---|---|
| 2 m (diagnostic) | ≈15% | 4969–4971 m | under overhead cover terrain reads 76.8% at 2179–2181 m across a structure — excluded |
| 3 m (diagnostic) | ≈15% | 4969–4972 m | under overhead cover terrain reads 72.0% at 2179–2182 m across a structure — excluded |
| 5 m | ≈15% | 4966–4971 m | under overhead cover terrain reads 67.7% at 2177–2182 m across a structure — excluded |
| 10 m | ≈15% | 4962–4972 m | under overhead cover terrain reads 39.6% at 2176–2186 m across a structure — excluded |
| 20 m | ≈14.6% | 4960–4980 m | under overhead cover terrain reads 22.1% at 2176–2196 m across a structure — excluded |
| 25 m | ≈14.6% | 4955–4980 m | under overhead cover terrain reads 18.6% at 2176–2201 m across a structure — excluded |
| 50 m | 14.2% | 4930–4980 m | |
| 100 m | 14.0% | 4890–4990 m |
may_start_earlierdescends_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 · OSM way 865534434 highlights the mapped road · 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.
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.
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© OpenStreetMap contributors · topo tiles © OpenTopoMap (CC-BY-SA) · vector tiles OpenFreeMap
Profile
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:26918",
"elevation_resolution_m": 1.0,
"elevation_tiles": [
"data/cache/usa/vt/USGS_1M_18_x66y490_VT_Statewide_A23.tif",
"data/cache/usa/vt/USGS_1M_18_x67y490_VT_Statewide_A23.tif"
],
"calculated_at": "2026-08-22T09:36:10+00:00",
"road_source": "OpenStreetMap (local PBF extract)",
"road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
"osm_ids": [
865534434,
865534435,
19729428,
1210071804,
995963778,
995963777
],
"osm_versions": {
"865534434": 7,
"865534435": 8,
"19729428": 25,
"1210071804": 1,
"995963778": 3,
"995963777": 3
},
"osm_timestamps": {
"865534434": "2023-09-22 15:32:40+00:00",
"865534435": "2023-09-22 15:32:40+00:00",
"19729428": "2024-09-07 22:34:48+00:00",
"1210071804": "2023-09-22 15:32:40+00:00",
"995963778": "2021-12-02 04:38:51+00:00",
"995963777": "2021-12-02 04:38:51+00:00"
},
"osm_retrieved_at": "2026-08-22T09:36:10+00:00",
"osm_pbf_path": "data/cache/pbf/vermont-260821.osm.pbf",
"osm_snapshot": "2026-08-21T20:21:11Z",
"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, VT_Statewide_A23 (collected 2023)",
"elevation_tile_ids": [
"x66y490",
"x67y490"
],
"route_base_cut_m": 2120,
"climb_origin": "named",
"notes": "VT-17 McCullough Turnpike from the Mill Brook valley (Waitsfield side). base_cut_m 2120 applied 2026-08-22 (ranked entries start where the climbing starts; forward-500 m >= 3% probe).",
"canopy_source": {
"kind": "ept_corridor_max_return",
"ept_source": "https://s3-us-west-2.amazonaws.com/usgs-lidar-public/VT_Statewide_2_A23",
"ept_crs": "EPSG:3857",
"station_coverage": 1.0,
"cell_ground_m": 1.0,
"nodes_failed": 0
},
"license": "ODbL-1.0",
"license_url": "https://howsteep.org/licensing.html"
}