Theodulhorn, Alpine summit between Valais, Switzerland and Aosta Valley, Italy

The Theodulhorn (Mont de Saint-Théodule) is a 3,469-metre Pennine Alps summit on the Swiss-Italian border, rising above the Theodul Pass south of Zermatt and east of Breuil-Cervinia. Its northern flank is heavily glaciated and forms part of a ski area. The summit is the easternmost point of the Furgggrat, the ridge descending from the Matterhorn's south-east ridge.

The Theodulhorn is named after the Theodul Pass below it, which in turn honours Saint Theodul, patron saint of Valais. The mountain forms the easternmost summit of the Furgggrat, the ridge descending from the Matterhorn's south-east ridge. Its northern flank is heavily glaciated and now part of a ski area.

The pass below the summit served for centuries as a crossing where mountain communities on both sides conducted trade and exchange. Today this connection remains visible in how hikers move freely across the border through the same routes their ancestors used.

The ascent is possible from Zermatt in Switzerland or Breuil-Cervinia in Italy, with both routes well marked and clearly defined. The best time to visit is from June through September, when snow coverage diminishes and the terrain becomes more accessible for walkers.

The Theodulhorn is the easternmost summit of the Furgggrat, the ridge descending from the south-east ridge of the Matterhorn. Its name comes from the Theodul Pass below, which is named after Saint Theodul, patron saint of the Valais.