These spoil heaps are among the highest in Europe, reaching approximately 186 meters in total elevation.
The conical shape was determined by the tipping methods used to discard rock waste from the adjacent coal shafts.
Loos-en-Gohelle is considered a pioneer in ecological transition, utilizing the site to study biodiversity in post-mining environments.
The site was inscribed on the UNESCO World Heritage list in 2012 as part of the 'Nord-Pas de Calais Mining Basin' property.
The base of the heaps often contains remnants of the rail infrastructure used to transport coal carts during the 20th century.
The soil composition of the slag heaps creates a unique micro-climate that supports specific, non-native plant species.
The twin heaps are officially identified as numbers 74 and 74A within the regional mining heritage registry.
During the peak of mining operations, this specific site processed coal extracted from depths exceeding 600 meters.
The Terril de Loos-en-Gohelle comprises two massive, conical coal spoil heaps that form part of a UNESCO World Heritage site representing the Nord-Pas de Calais Mining Basin. These artificial hills were created by centuries of coal extraction at the adjacent Pit 11 and 19 mines. The site features a restored mining landscape that has undergone significant ecological rehabilitation since the closure of the pits. Visitors can hike to the summit of the twin heaps for an elevated view over the surrounding flat plains of the Lens region. The site serves as a physical memorial to the industrial heritage and labor history of Northern France. The terrain is characterized by loose shale and colonizing pioneer flora that reflect the natural reclamation of post-industrial ground.
The highest point of the twin slag heaps for a panoramic 360-degree view of the mining landscape.
Wear sturdy, closed-toe hiking shoes with good grip to manage the loose shale on the climbing paths.
Bring binoculars for the summit, as you can see as far as the Lille metropolitan area on clear days.
Check the local weather forecast before visiting, as the summits are highly exposed to wind and offer no shade.
Do not attempt to climb the slopes directly outside of the designated trails, as the ground is unstable.
Stay strictly on marked paths to prevent erosion and avoid disturbing the local ecological restoration zones.
