Mount Haast, Mountain summit in the Southern Alps, Westland District, New Zealand

Mount Haast is a mountain in the Southern Alps / Kā Tiritiri o te Moana, in the Westland District of New Zealand's South Island. It has three peaks: the highest reaches 3,114 metres, with two secondary peaks to the north at 3,099 and 3,065 metres. The peaks rise at the head of the Albert Glacier, just north of the Main Divide.

Mount Haast was named by James Mackay (1831–1912) after the German-born geologist Julius von Haast; Mackay gave the same name to a second, lower peak near Springs Junction in the Buller District. The first ascent of the 3,114-metre summit was made in February 1907 by Alex Graham and Henry Newton via the Marcel Col.

The mountain's name honours Julius von Haast, the German-born geologist after whom James Mackay also named a second, lower Mount Haast near Springs Junction in Buller District. The summit rises at the head of the Albert Glacier, the original name of the glacier whose lower part was later renamed Fox Glacier.

Climbers need advanced skills and specialized gear to navigate the steep passages and rugged terrain that define this peak. The best season for attempting the climb is during warmer months when weather patterns are more stable.

This summit stands directly above the Albert Glacier with secondary peaks nearby that reach approximately 3,099 meters and 3,065 meters. The arrangement of these neighboring crests creates a distinctive profile visible from certain viewing angles.