The Mazeno Ridge is an arête, a long narrow ridge, and part of the Nanga Parbat massif in Gilgit-Baltistan, Pakistan, in the Himalayan range. The ridge is the longest of any ridge on the eight-thousand-metre peaks in the Himalayas. A series of eight subsidiary peaks form the ridge, the highest being Mareno Peak . All eight subsidiary peaks have been climbed, but a complete traverse of the ridge and ascent of Nanga Parbat was only successfully achieved in 2012, and as of 2019, no other expedition has reached the summit of Nanga Parbat via the Mazeno Ridge.