Park in the car park of the former Bellou-sur-Huisne station, now disused.
(S/E) Head west and follow the greenway towards Mortagne-au-Perche (the greenway runs along the old railway line).
(1) Cross the Route de Saint-Paterne (Bellou church on the right). Then cross the D920 and continue along the greenway. Walk past the cemetery and continue to a junction with a path.
(2) Turn left onto the Chemin de la Fosse à la Fille. Cross the D920 again (be careful, there is no pedestrian crossing) and follow it to the left for about twenty metres, then take a path on the right. Follow this path for about 200 m until you reach a junction of three paths (not shown on the map).
(3) Then turn right towards Les Petites Bertinières. The path may be damp in winter. Pass a few houses and continue southwards. You will come out onto the small Route des Bertinières; follow it to the left as it climbs slightly. You will soon reach the Route de Saint-Paterne; follow it for about fifty metres.
(4) Then turn right onto the road towards La Gicquetière. Pass this hamlet and its farm and immediately turn left towards l’Angenadière. Pass this hamlet and continue along a dirt track.
(5) At the crossroads, turn left and head down a small valley towards the Grotte de la Mansonnière.
(6) At the next junction, turn left and you will immediately find the cave on your right. Continue along the path northwards, towards La Petite Mansonnière.
(7) Once you reach La Petite Mansonnière, take a path on the right. The path turns left and joins the greenway further on. Then turn right and you will soon reach the car park at the old station (S/E).