Sławomir Rawicz claimed in his book The Long Walk, published in 1956, that as he and some others were crossing the Himalayas in the winter of 1940, their path was blocked for hours by two bipedal animals that were doing seemingly nothing but shuffling around in the snow.

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Beginning in 1957, a very wealthy American oilman Tom Slick funded a few missions to investigate Yeti reports. In 1959, supposed Yeti feces were collected by one of Slick's expeditions; fecal analysis found a parasite which could not be classified. Cryptozoologist Bernard Heuvelmans wrote, "Since each animal has its own parasites, this indicated that the host animal is equally an unknown animal." The United States government thought that finding the Yeti was likely enough to create three rules for American expeditions searching for it: obtain a Nepalese permit, do not harm the Yeti except in self-defense, and let the Nepalese government approve any news reporting on the animal's discovery.

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In 1959, actor James Stewart, while visiting India, reportedly smuggled remains of a supposed Yeti, the so-called Pangboche Hand, by concealing it in his luggage when he flew from India to London.

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In 1960, Hillary mounted an expedition to collect and analyze physical evidence of the Yeti. He sent a supposed Yeti "scalp" from the Khumjung monastery to the West for testing, whose results indicated the scalp was manufactured from the skin of a serow, a goat-like Himalayan antelope.

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Up to the 1960s, belief in the yeti was relatively common in Bhutan and in 1966 a Bhutanese stamp was made to honor the creature. However, in the twenty-first century belief in the being has declined.

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In 1970, British mountaineer Don Whillans claimed to have witnessed a creature when scaling Annapurna. According to Whillans, while scouting for a campsite, he heard some odd cries which his Sherpa guide attributed to a Yeti's call. That night, he saw a dark shape moving near his camp. The next day, he observed a few human-like footprints in the snow, and that evening, viewed with binoculars a bipedal, ape-like creature for 20 minutes as it apparently searched for food not far from his camp.

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In 1983, Himalayan conservationist Daniel C. Taylor and Himalayan natural historian Robert L. Fleming Jr. led a yeti expedition into Nepal's Barun Valley (suggested by discovery in the Barun in 1972 of footprints alleged to be yeti by Cronin & McNeely). The Taylor-Fleming expedition also discovered similar yeti-like footprints (hominoid appearing with both a hallux and bipedal gait), intriguing large nests in trees, and vivid reports from local villagers of two bears, rukh balu ('tree bear', small, reclusive, weighing about 150 pounds) and bhui balu ('ground bear,' aggressive, weighing up to 400 pounds). Further interviews across Nepal gave evidence of local belief in two different bears. Skulls were collected, these were compared to known skulls at the Smithsonian Institution, American Museum of Natural History, and British Museum, and confirmed identification of a single species, the Asiatic Black Bear, showing no morphological difference between 'tree bear' and 'ground bear.' (This despite an intriguing skull in the British Museum of a 'tree bear' collected in 1869 by Oldham and discussed in the Annals of the Royal Zoological Society.)

There is a famous Yeti hoax, known as the Snow Walker Film. The footage was created for Paramount's UPN show, Paranormal Borderland, ostensibly by the show's producers. The show ran from 12 March to 6 August 1996. Fox purchased and used the footage in their later program on The World's Greatest Hoaxes.