The information given on Quid for the Oppidum du Pic St-Martin is accurate – while the new IGN Seies Bleu map – and the http://www.geoportail.fr placing – is out by nearly 2 km. Its position is 2. 39′ 54″ E, 43. 20′ 11″ N and it is a most impressive structure. The site was occupied continuously from the Iron Age through to the arrival of the Visigoths. The earliest inhabitants were possibly the Ibères or the Ligures, but more certainly the Volques Tectosages [ a Celtic tribe that put up a fierce resistance to the invading Romans, and who were themselves an invading force from Middle Europe – the name translates best as Land-hungry Wolves ].
The scree slope rises about 300 feet from here to the walls.
More photos and info on the Pic St-Martin Hillfort Page