Sasquatch (Walter Langkowski) is a superhero appearing in American comic books published by Marvel Comics. He first appeared in The Uncanny X-Men #120 (April 1979) and was created by John Byrne and Chris Claremont. Langkowski is a scientist turned into a Sasquatch-like being through a controlled gamma-radiation experiment which linked him to the god Tanaraq. He is a long-term and founding member of Alpha Flight.