Tour d'Aï, Mountain summit in Vaud, Switzerland

The Tour d'Aï is a limestone summit reaching 2,330 metres in the Vaud Prealps, in the canton of Vaud, Switzerland. With the Tour de Mayen and the Tour de Famelon it forms a ridge line separating the valley of Les Ormonts from the Hongrin valley. Its northern side drops as a sheer, vertically fluted cliff of pale grey limestone, cut by horizontal strata and dark streaks, above a slope of grass, loose grey scree and scattered dark green shrubs; a small flat-roofed structure stands on the grassy slope below the cliff.

The Tour d'Aï is a limestone summit of the Vaud Alps, 2,330 m high, in the canton of Vaud. With the Tour de Mayen and the Tour de Famelon it forms a ridge line separating the valley of Les Ormonts from the valley of l'Hongrin (Eau Froide). The summit is reached by a trail on its northern slopes, from the alp of Aï near the Berneuse, above Leysin.

The summit stands on a ridge that separates the valley of Les Ormonts from the valley of the Hongrin, whose stream is called Eau Froide. With the Tour de Mayen and the Tour de Famelon it forms a line of peaks above Leysin, visible from the Lake Geneva region.

The summit is reached by a trail on its northern slopes, starting from the alp of Aï near the Berneuse, above Leysin. The same trail also passes near the Tour de Mayen, so both summits can be visited on one walk.

The summit is reached by a trail on its northern slopes, starting from the alp of Aï near the Berneuse above Leysin. From the ridge between the Rhone and Col des Mosses, the Tour d'Aï and the nearby Tour de Mayen can both be seen from Lake Geneva.