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County Down — road climbs measured by LiDAR
All 1 published climbs in County Down, ranked by their steepest 25 m and measured on the national 1 m LiDAR surveys.
Surface: Paved roads All surfaces · Caveated rows: Show Hide (ranks stay the true ranks) · every published row is listed here — the toggles filter this page without hiding anything from the links above.
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This page last changed 27 September 2026 — what changed across the survey .
Gradients are LiDAR-derived road-centreline measurements over stated plan distances — not surveyed asphalt gradients. Windows of 2–3 m are diagnostic only (raster-noise scale) and are never used in rankings. Nothing on this site is a route recommendation: climbs are measured from open data, not vetted, inspected or guaranteed. Access, rights of way, surfaces, traffic and safety are yours to judge on the ground.
Road geometry © OpenStreetMap contributors (ODbL). Elevation: contains Welsh Government information © Crown copyright and database right, Environment Agency data © Environment Agency, Scottish public-sector LiDAR © Scottish Government, SEPA and partners; Crown copyright, and Northern Ireland river-basin LiDAR via OpenDataNI © Crown copyright (Belfast City 2006 data © Cyient Europe Ltd, published as open data by DfI) — all under the Open Government Licence v3. Reuse of this site's own work: any individual climb's page and charts CC BY 4.0, the dataset ODbL 1.0 — details .