Roc della Niera, Mountain summit in Queyras massif, France and Italy.

Roc della Niera, also called Tête des Toillies, is a 3177-metre summit of the Escreins massif on the France-Italy border, between the Colle dell'Agnello and Mongioia. It is made of dark gabbro, which gives the rock its name. The upper part forms a narrow, jagged pinnacle above a broad base of grey scree, with vertical fissures and loose stone on the lower slopes.

The mountain has long served as a boundary marker between the two countries, with border stones at Col Blanchet displaying French and Italian symbols. This division reflects historical territorial settlements in the Alps that remain visible today.

The summit sits on the France-Italy border, making it a place where two countries meet on the mountain. Visitors notice this division when they reach the top and see how the landscape tells a story of territorial separation.

The climb approaches from the south via Col de la Noire, taking about two hours from Refuge de la Blanche at 2499 meters elevation. Mountaineers should bring proper alpine gear and experience, as conditions on the route can be demanding.

The dark colour of the rock, which gives the mountain its Italian name, comes from gabbro: the summit is a mass of this coarse, dark intrusive rock rather than the limestone of much of the surrounding Alps. The French name Tête des Toillies and the Italian Roc della Niera both refer to the same 3177-metre border summit.