Wikipedia
Snowbeast is a 1977 American made-for-television horror film starring Bo Svenson, Yvette Mimieux, Robert Logan and Clint Walker which premiered on NBC on April 28, 1977. The film was shot at Crested Butte Mountain Resort in Gunnison County, Colorado.
The movie details the attacks of a ravenous creature (a Yeti or Bigfoot/Sasquatch) on a Colorado ski resort. The teleplay was written by Joseph Stefano, who wrote the script for Alfred Hitchcock's classic 1960 thriller Psycho. Stefano reportedly used a book by Roger Patterson (who claimed to have encountered a Sasquatch in 1967) as his primary inspiration, though no credit is given.
Snowbeast was directed by Herb Wallerstein, a veteran of many television shows such as I Dream of Jeannie, Star Trek, The Brady Bunch and The Six Million Dollar Man.