Trisul I T. G. Longstaff made the first climbing reconnaissance of Trisul, in September 1905, focussing on the western and southern sides. He returned in 1907 with
Charles Granville Bruce, Arnold L. Mumm; the three
Alpine guides Moritz Inderbinnen and the brothers Henri and Alexis Brocherel; and a number of
Gurkhas, including Karbir Burathoki. They ascended through the
Rishiganga valley, to the north of the peak, onto the Trisul Glacier, which lies on the east side. From there they climbed the northeast flank to the north ridge, reaching the summit on 12 June. At the time Trisul was probably the
highest mountain to have been climbed, a record which stood until the ascent of
Pauhunri in 1911. The climb was noted also for the first use of supplementary oxygen in a major climb. He wrote about his experiences on Trisul in articles for the journal
Alpinisme and for the magazine
Point de Vue Images du Monde. In June 1949, Walter had achieved the third ascent of
Pauhunri. As a result of his Pauhunri and Trisul climbs, he became a member of the
Groupe de Haute Montagne in 1954, sponsored by
Maurice Herzog and
Robert Tézenas du Montcel. Routes on the west face and south ridge of Trisul I have also been climbed. The south side was first ascended in 1976 by a Yugoslavian expedition, with Slovenian climbers Andrej Graseli and Štefan Marenče reaching the peak on 15 May, followed by Vanja Matijevec the following day. There was a notable ski expedition to Trisul by
Indian Institute of Skiing and Mountaineering, Gulmarg with Lt Col N. Kumar as the leader.
Trisul II and III Trisul II and Trisul III were first climbed in 1960 by the Yugoslav team . They climbed from the Bidalgwar glacier, achieving the summit of Trisul II via the southern ridge and Trisul III via the north ridge. Another Yugoslav expedition made the first traverse of the three peaks in 1987, and two members
paraglided from the summit. ==Access==