Trisul from the West, between Ghat and Sitil.
The Trisul group forms the southwest corner of the ring of peaks enclosing the Nanda Devi Sanctuary, about 15 kilometres (9 mi) west-southwest of Nanda Devi itself.
The first serious climbing expedition to pass through the Outer Nanda Devi Sanctuary was that of Tom George Longstaff, an English doctor, explorer and mountaineer, who climbed Trisul I in 1907 via the Trisul glacier. He thus became the first person to climb a summit of over 7000 meters in elevation.
October/November 2010. Photo by
Tracey Maund