Refine your search for walks in Chaîne des Terrils
Le Bois de Mont (short version)
Walker 
9.89 km
+140 m
-138 m
3h 15
Moderate
Departure from Bouvigny-Boyeffles (Pas-de-Calais)
Lots of paths, a beautiful crossing of the Bois (with decent tracks) and a beautiful view as you reach the plateau (but frequent fog in autumn).
2021: I've gone back to the original route, which is more pleasant.
Slag heap 115 (known as "Téléphérique" - “The Cable Car”)
Walker 5.82 km
+14 m
-14 m
1h 40
Easy
Departure from Libercourt (Pas-de-Calais)
The route begins in the forest, with birdwatching available from observation posts. Then the landscape becomes more undulous as you climb Slag heap 115 (viewpoint over the coalfield) and return via the miners' cottages.
Slag Heaps 83 and 94 - Fouquières marshes
Walker 8.97 km
+52 m
-54 m
2h 45
Easy
Departure from Harnes (Pas-de-Calais)
A route that takes you through the Fouquières marshes. You'll climb the wooded slag heap 83, offering a view of a mysterious artificial valley. You'll then head for slag heap 94 (staircase slag heap), passing the schlamm bins (storage of mining waste) and the Harnes fishing pond. Return along the path that runs alongside the Lens canal.