Château de La Corbière

Château de La Corbière is a ruined medieval fortress in the commune of Challex, in the Ain department of the Auvergne-Rhône-Alpes region. Built probably in the mid-12th century, the stronghold once stood on a rocky spur above the Rhône and for centuries was a key defensive point on the frontier between the lands of Geneva and Savoy.

How to get there?

The ruins lie about 1.5 km southeast of the village center of Challex, a small commune in the Pays de Gex, close to the Swiss border and not far from Geneva. The fortress sits on a sandstone promontory around 510 meters above sea level, overlooking the right bank of the Rhône. The easiest way to reach it is on foot, starting from the square in front of Challex town hall, where a marked walking trail leads out toward the river.

What will you see?

The stronghold was built in the 12th century and soon became property of the Counts of Geneva, forming a separate enclave of the Land of Gex within the surrounding barony. During the 13th century, the castle was fought over by the Counts of Geneva and the Lords of Faucigny, rival powers competing for influence in this part of the region. In 1287, the Count of Geneva bought the fortress outright, but within a few years, between 1291 and 1292, Savoyard troops besieged and captured it. The castle met its final end in 1321-1322: a siege that began on 17 November 1321 ended on 28 December with Savoy's forces taking the stronghold and destroying both the castle and the bridge it had been built to defend.

Today only fragmentary foundations and wall sections remain, overgrown with scrub. A stone marker indicates the site of the former castle — without it, the ruins would be almost impossible to spot among the vegetation.

The trail to the ruins

The Château de La Corbière is reached via a local walking route called the "Parcours de la Corbière," roughly 4 km long and taking about an hour, with around 130 meters of elevation gain. The trail is moderately demanding, and the stretch near Ravoire can get slippery, especially after rain. Along the way, walkers pass the old fortified house known as "Confignon," the restored Champ Novaz fountain, and — beyond the castle ruins themselves — the remains of the old Challex mill. The walk can be extended along an easy riverside path all the way to the Chancy-Pougny dam. The whole route showcases the pastoral, agricultural character typical of the southern Pays de Gex, with views over the Rhône valley.

When to visit?

Since this is an unmanaged, open-air ruin with no visitor infrastructure, the best time to come is from spring through autumn, when the trail is dry and the slippery sections are easier to manage. Longer summer days make it easy to combine the walk to the castle with an extended route along the Rhône all the way to the dam, while autumn tends to bring fewer walkers and cooler conditions for the climb.

Frequently asked questions

What remains of Château de La Corbière today? Only fragmentary foundations and overgrown wall sections survive, marked by a stone indicator showing where the fortress once stood.

Who destroyed the castle? Savoyard forces captured and ultimately destroyed it — first during a siege in 1291-1292, then definitively after a siege that ended on 28 December 1321.

How do you reach the ruins? On foot via the "Parcours de la Corbière" trail, which starts at Challex town hall and covers about 4 km.

Is the trail to the castle difficult? It's moderately challenging, with about 130 meters of elevation gain; the section near Ravoire can be slippery, especially after rain.