Fleckistock, Alpine summit in Uri, Switzerland

Fleckistock is a 3,417-metre summit in the Urner Alps above Wassen, the highest point of the range between the Sustenjoch pass and the Salbitschijen. Its east flanks carry the Rütifirn and Kartigelfirn glaciers, while the west side is almost ice-free.

The name Fleckistock appears alongside Rot Stock, meaning red rock, in reference to the reddish rock of the mountain. The summit stands at 3,417 metres in the Urner Alps above Wassen, and the massif forms the highest point of the range east of the Sustenjoch pass at 2,656 metres.

The mountain's other name, Rot Stock, refers to the reddish rock of its flanks, and the summit is listed at 3,417 m in English sources and 3,416 m in French ones. The Voralp hut at 2,126 m, owned by the Swiss Alpine Club, is the base from which the usual south-western ascent starts.

Climbers typically ascend via the normal route from Voralp hut at 2,126 meters (6,975 feet) following the south-western ridge. The route is accessible to experienced mountaineers with adequate alpine skills.

The Fleckistock is also called Rot Stock, a name pointing to the reddish rock of the massif. It is the highest summit of the range that runs from the Stucklistock to the Salbitschijen, between the Voralp, Göschenen and Meiental valleys. The Sustenjoch pass below it lies at 2,656 metres.