Distance/Time: 12,7 km – 3h15
Elevation change : 250 m
Level : Intermediate
Geosites : Castle of th Counts, Cave of Lorette, "Trou du Nou Maulin" Cave, "Pré au Tonneau" Cave, Centre for Rail and Stone, The Gerny plateau, Boverie quarry, Malagne, the Rochefort Archaeopark, Tourist Train of Rochefort
This geotrail starts from the centre of Rochefort and leads to Jemelle via the RAVeL 150 cycle path, along the valley of the Lomme. The valley here follows the limestone strip and is shaped by major karst phenomena. The return to Rochefort is along the left bank of the Lomme, climbing up to the edge of the Gerny plateau and including a suggested detour to visit the Gallo-Roman villa in Malagne.