CR-26001
Brief
In November 1951, mountaineer Eric Shipton photographed unusually large humanoid footprints in the snow of the Menlung Glacier on the slopes of Everest, sparking decades of debate over the existence of an unidentified Himalayan primate.
Filed 2026-05-09 · Last updated 31 May 2026
On 8 November 1951, during a reconnaissance of approaches to Mount Everest, the British mountaineer Eric Shipton photographed a series of large footprints in snow on the Menlung Glacier, on the Nepal–Tibet frontier. The images — particularly one showing a single clear print beside an ice axe for scale — became the most widely reproduced photographic evidence associated with the yeti, and remain the central artefact in the modern debate over the creature’s existence [1].
In late 1951, Shipton led a small reconnaissance party tasked with surveying the southern approaches to Everest in advance of a future summit attempt. The party included Michael Ward and the Sherpa Sen Tensing. On 8 November, while crossing the Menlung Glacier at an altitude of approximately 5,500 metres, the group encountered a line of fresh tracks in firm snow [1].
Shipton and Ward followed the trail for a considerable distance. Shipton then photographed two views: a long sequence of prints receding across the snowfield, and a close-up of a single print with his ice axe (shaft length approximately 33 cm) laid alongside for scale [1]. Sen Tensing reportedly identified the prints as those of a yeti, a creature familiar to him from local accounts [3].
The expedition returned to Britain via India, and Shipton’s photographs were circulated to the press and deposited, along with field notes and correspondence, in the Royal Geographical Society’s archives in London [2].
The primary record consists of Shipton’s original 1951 photographs and the supporting expedition file held by the Royal Geographical Society, which includes correspondence, route notes and statements from members of the reconnaissance party [1, 2]. The close-up footprint image — showing a print roughly 33 cm long and 20 cm wide, with what appears to be a pronounced hallux and three or four smaller toes — is the single most-cited piece of yeti-related photographic evidence [1].
Decades later, the mountaineer Reinhold Messner conducted his own multi-year investigation across the Himalaya and Tibetan plateau, drawing on Sherpa testimony, monastery records and direct observation. Messner concluded that the creature described in regional folklore corresponded primarily to the Tibetan blue bear (Ursus arctos pruinosus) and, in some accounts, the Himalayan brown bear, whose tracks in soft snow can melt out and overlap to produce the elongated, humanoid impressions of the Shipton type [3].
The RGS file also preserves later commentary from Ward, who in subsequent decades discussed the photograph’s interpretation and the difficulty of reconstructing the original snow conditions from the image alone [2].
Several evidential gaps persist. No casts were taken of the Menlung prints, and no second photographer documented the trail, so the only record of scale and morphology is Shipton’s own film. The interval between the prints’ formation and their photography is not precisely established, leaving open the degree to which sun-melt may have enlarged or distorted the original impressions. Whether the close-up print and the longer trail were made by the same animal — a point not directly addressed in the surviving field notes — also remains unresolved.
This file is admitted at OFFICIAL tier because its core artefacts are institutionally held and independently consultable: Shipton’s photographs and expedition correspondence are catalogued within the Royal Geographical Society archives [2], and the case has received sustained engagement from a credentialled investigator whose findings are published in book form [3]. The file makes no claim as to the nature of the track-maker; it documents a verified 1951 photographic encounter and the documentary trail that followed.