Aiguille de la Tsa, Alpine summit in Valais, Switzerland

The Aiguille de la Tsa is a 3,668-metre rock needle in the Swiss Pennine Alps of Valais, rising above Arolla on the ridge that culminates at the Dent de Perroc, between the Arolla valley and the Mont Miné Glacier.

The mountain was first climbed on July 21, 1868, by Pierre Beytrison, who established the initial routes that climbers still use. This early ascent marked the beginning of the peak's recognition in the alpine climbing community.

The peak's name, "Tsa", comes from the local Valais dialect and appears on maps alongside the neighbouring Dent de Perroc. The mountain stands above Arolla, a village that became a base for British and Swiss climbers in the late 19th century, and the two summits are often seen together from the valley.

The Aiguille de la Tsa stands above Arolla in the Valais, on the ridge between the Arolla valley and the Mont Miné Glacier, and is reached from the village via the valley and glacier approaches. The summit is a technical rock climb, so plan for a full day with a rope and protection. Check conditions with local guides in Arolla before setting out.

The Aiguille de la Tsa rises to 3,668 m on the ridge that culminates at the Dent de Perroc, between the Arolla valley and the Mont Miné Glacier. Its pointed profile gave it the name "Tsa", and the German sources describe it as a needle in the crest between Arolla and Ferpècle.