Start from the car park in front of the town hall. The sign is on the front of the town hall. Route No. 2 is marked with two horizontal yellow and blue stripes (URV standard).
(S/E) Turn right onto Rue Pierre Curie; at the roundabout, turn left onto Rue du Paquis. Walk past the fountain; at the traffic lights, turn left into Rue de Sochaux and continue to the roundabout. Carry on to the right along Rue de Sochaux for 50 metres. After the shop, turn right into Rue des Prés and continue for 400 metres. Stay on this street until you reach Rue de Montbéliard at the ‘Stop’ sign.
Turn right onto it and immediately turn left onto the footpath, which ends in a flight of steps. Cross Rue des Pervenches and turn left onto it. At the junction, turn right into Rue des Bleuets, then continue along Rue des Myosotis. You’ll soon reach the junction with Impasse des Dahlias.
Turn left onto it, then immediately turn right onto the path that runs alongside the fence towards the woodland leading up to the fort. At the signpost, go straight on until you come to a crash barrier.
(1) Turn left and walk alongside the crash barrier for 20 metres. On the other side of the road, a signpost directs you to continue along this road. In front of the leisure centre building, at the signpost, follow Route No. 2, straight on for 200 metres to the foot of a radio mast. Turn left and walk alongside the pastures to reach the footpath.
(2) Take this path to reach the eastern viewpoint. Enjoy the view over the Savoureuse valley, the Vosges, etc. An orientation board describes the landscape.
Note: Alternatively, you can follow the Caponnière route, which is marked in red. After visiting the viewpoint, the signpost indicates you should take the path on the left. Follow the edge of the ditch until you reach a flight of steps. Turn left for 20 metres and then veer right. Continue along a grassy path; on your left is the southern slope of the fort, which overlooks the town of Sochaux. The path curves slightly to the right and climbs gently. You’ll come to a crossroads.
(3) It’s worth taking a quick look around the farmyard here. To do this, at the crossroads, go straight on to a tarmac road and take the path between the two fences. After your visit, turn back and return to the crossroads.
Turn right towards Route No. 2 along the grassy path. When you reach a white building and a signpost, continue along Route No. 2 by heading straight on. Here, two large boulders prevent vehicles from using the path.
Head towards a street lamp and go round it on the left to arrive between two copses. You’ll emerge at the fort’s car park. Turn right and walk for 110 metres. You’ll reach the junction you passed earlier.
(1) At the sign for the fort’s esplanade, turn left for 30 metres. At the sign for the woods of Fort Lachaux, turn left and walk downhill for 70 metres. Exit the woods at the foot of the blocks of flats. Turn right. At the roundabout, take the third exit onto Rue des Pâquerettes, then turn right onto Rue des Campenottes and right again onto Rue des Primevères.
Turn right onto the footpath that runs alongside the school and go down the steps towards Rue des Marguerites. Cross the street, turn left, then cross Rue de la Libération and turn left onto it. Turn right onto Rue Louis Jeanperrin. At the roundabout, turn right towards the post office and continue straight on along a footpath which crosses an orchard and leads further on to Rue des Jonchets.
(4) Turn left. At the next junction, turn left. You’ll arrive at Parc des Jonchets. Follow the grassy path, then take the wooden footbridge across it; at the signpost, turn right, staying on the footbridge, onto a grassy path. Turn left onto a concrete path until you reach the signpost indicating a right turn.
Alternative route: turn left onto a path leading to a copse and two benches with a view of a lake.
(5) At the signpost, turn right towards Grand-Charmont along a stony path. Join the Allée des Prelots; turn right onto it for 10 metres, then continue to the right onto the footpath that runs alongside the Allée des Roselières. At the junction, go straight on, continuing along the Allée des Chézeaux. Take the pedestrian crossing opposite, between two detached houses, which leads back to the starting car park (S/E).