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Park in the Grottes car park opposite the Soyons cemetery.
Yellow and white signposts
(S/E) From the car park opposite the cemetery, go up the small street on the right until you reach the crossroads. Turn right onto Chemin du Vivier (signposted Musée archéologique) and join the D86. Cross the road (be careful, it is very busy) and look for a small underpass opposite which, after a few steps, will take you across the railway line.
Immediately afterwards, cross the canal and turn right to follow it along the left bank. At the junction with a tarmac road, turn right for a few metres, then leave this road on your right and continue straight ahead on a dirt track to reach the mouth of a branch of the Rhône (Lône de l'Ove).
(1) The path turns right and follows this waterway until it crosses a bridge.
No signposts
Continue along the path opposite (slightly to the right at the start), leaving the bridge on your left and a path on your right. Continue along the Lône until it ends on a stabilised path. After a short climb, the path turns right, joining another path coming from the left. 100m further on, at the large rocks, continue on the path on the right. Shortly afterwards, cross a small hill and join another path.
(2) Turn sharply right to quickly reach a new crossroads (Via Rhôna sign).
Yellow-white markings
Continue left on a small paved road. Cross the railway tracks (be careful at the level crossing!) and immediately take a small road parallel to it. Continue straight ahead and 150m further on, cross the D86 (be careful here too, as the road is very busy!). Continue in the same direction on the small road until you see a signpost next to a beautiful stone house.
(3) Turn left then right to pass between two houses and find a path that climbs into the forest. At the Jonchère signpost, continue straight ahead towards Toulaud. Shortly afterwards, a path is indicated on the left on the IGN map, but it is no longer visible on the ground. A little further on, join the Chemin de Turlet.
(4) Turn right and follow the path, which levels out for a while before climbing steeply to a small paved road (Chemin de Jonchère). Follow the road to the left for 100 m, then at the Chemin de Jonchère signpost, leave the tarmac and turn right towards Les Grottes on Chemin de Pierrette. Ignore a grassy path on the right just after the signpost, which is not shown on the map.
(5) After 100m on Chemin de Pierrette, at the signpost of the same name, leave the path and climb up to the right towards Soyons. 50m higher, at the crossroads, turn left towards La Tour Penchée. The path runs along the hillside and offers a clear view of the upper districts of Soyons. Pick up a path coming from the right and continue up a steep slope that leads to the Plateau du Serre de Guercy.
At the signpost, continue straight ahead towards Les Grottes on a small steep path. 30 metres further down, turn left towards La Tour Penchée, leaving the path that leads to the caves on your right (this will be for later). After a short but steep descent, reach the bottom of the valley and the signpost Bas de la Tour. First turn left then right to follow the path that climbs steeply. Do not follow the flat path that branches off to the left. Reach the Tour Penchée and its beautiful views of the Rhône Valley and the Vercors.
(6) Turn around and go back down to the signpost for Bas de la Tour. Continue left on the marked trail. At the next intersection, turn right onto the trail, which is also marked and dotted with botanical signs. It continues more or less along a ledge and joins the Grottes de Néron.
(7) Turn around and go back to the previous junction, then turn right and descend, taking advantage of the facilities. Join the Chemin du Vivier and after a few metres, you will reach the car park (S/E).
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