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Car park opposite the post office in Harnes.
(S/E) Head towards the Lens Canal and cross the bridge, heading for the other bank and the opposite pavement. Turn right then immediately keep left at the three-way junction and walk for about 150 m. Then turn right, heading towards Bois Florimond. Walk past the lagoons and, at the end, turn left towards the slag heap.
(1) Turn right for a lovely little detour, offering the chance to admire magnificent trees and somewhat surprising undergrowth. Complete a circular route and return to the path you left earlier.
(2) Take this path again on the right.
(3) Turn left then right to begin the walk around the slag heap.
(4) At this point, you can already see some lovely fumaroles on the slope of the slag heap, on the right. Continue keeping to the right at the various junctions you come across.
(5) On the right, a gate marks the start of the Chemin des Fumerolles and the climb up the slag heap. It’s straightforward: simply follow the path and enjoy the various views at the dead-end points: a view of the south-east of the mining basin, then a view of the canyon, and finally the fumarole observation point.
After descending the stairs, turn right.
(3) At the crossroads you passed on the way there, turn left.
(2) Continue straight on and retrace your steps along the path you took on the way there to return to the starting point (S/E).
Visorando Member
Association / Club / Walk leader
Moderate 
