Hristo Prodanov () (24 February 1943 – 21 April 1984) was a Bulgarian mountaineer. Prodanov was the first Bulgarian to climb Mount Everest, doing it via the most difficult way—the West Ridge—as well as alone and without oxygen. Prodanov was the first person to climb Everest in April, when the weather conditions are generally too bad for an expedition, and also the thirteenth person (the first person from the West Ridge) to climb Everest without the use of bottled oxygen. Climbing the summit at 18:15 local time, he had to descend overnight and got lost shortly after that. On the next afternoon, he reported he had lost his gloves and soon would be unable to hold the radio button long enough to talk. His body was never found. Prodanov was still a student when he became involved in mountaineering. He began work as a metallurgical engineer in Kremikovtzi AD in 1976. He had his first 7000 m ascent on 6 August 1967 when he climbed Lenin Peak. He had previously climbed several peaks in the Alps. His major successes were related to Hindu Kush (1976) and Lhotse. In 1981, he was the first Bulgarian to climb Lhotse without the use of supplementary oxygen. His niece, Mariana Prodanova Maslarova, attempted to climb Mt. Everest (without the use of supplemental oxygen) on the 20th anniversary of her uncle's death. Maslarova died of exposure at 8,700 meters, exactly 20 years and 30 days after her uncle. Climbs 8000m ascents Lhotse (8516m) - 30 April 1981, solo, without oxygen Everest (8848m) - 20 April 1984, solo, without oxygen 7000m ascents Lenin Peak (7134m) - 2 August 1975, 28 July 1982, 6 August 1982, 13 July 1983, 2 August 1983 Communism Peak, today known as Ismail Samani Peak (7495m) - 29 July 1980, 24 July 1983 Peak Korzhenevskaya (7105m) - 28 July 1979, 31 July 1979, 8 August 1982, 29 July 1983 Noshaq (7492m) - 30 July 1976 Alps North face of Matterhorn (4471m) - 21–26 September 1974, together with Trifon Djambazov North face of Grand Jorasses on the Walker Spur (4208m) - 30 July - 1 August 1967, together with Atanas Kovandzhiev Petit Dru (3733m), Bonatti route - 16–18 July 1967; "Route of Guides" - 3–8 September 1977 Mont Blanc (4807m), Freney Pillar - 15–16 July 1969 Caucasus Pillar of Ushba - 25–28 July 1970 Traverse in Shkhelda (4320m) – 24 July – 1