Mount Ortigara, Mountain summit at 2106 meters in Province of Vicenza, Italy.

Mount Ortigara is a 2,106-metre limestone peak at the north-eastern edge of the Seven Municipalities Plateau, on the border between Veneto and Trentino-Alto Adige. From the south it looks unassuming, while its northern side drops in sheer walls into the Sugana Valley. The summit area is pitted with numerous karst sinkholes.

In June 1917, the mountain became the center of one of World War I's largest battles, with more than 400,000 soldiers engaged in combat over the summit area. The intense fighting left deep marks on the landscape that remain visible today.

The mountain is known as the "Calvary of the Alpini". In September 1920 about 2,000 people climbed to the summit for the first national Alpini gathering, placing a broken column inscribed "Per non dimenticare". On the second Sunday of July a ceremony at the Cima Lozze chapel moves up to the Italian and Austro-Hungarian monuments.

The summit is reached from the Asiago Plateau, while the Sugana Valley side offers only steep paths. The northern face drops over 1,500 metres, so the two approaches differ greatly in effort. Snow can lie several metres deep in winter, and hollows south of the southern escarpment have recorded temperatures beyond 30 degrees below zero.

The mountain's limestone bedrock produces extensive karst, marked by numerous dolines pockmarking the slopes. In the hollows south of the southern escarpment, temperatures can drop past 30 and even 40 degrees below zero in snowy years. The asteroid 8944 Ortigara, discovered in 1997 at the Asiago observatory's Cima Ekar station, is named after the peak.