Jack Twist is a fictional character from the short story and film adaptation titled Brokeback Mountain, created by Annie Proulx. He is a young cowboy who develops a complex romantic relationship with another cowboy, Ennis Del Mar, while working together on Brokeback Mountain in the 1960s. Jack is portrayed as passionate and adventurous, often seeking deeper connections despite societal pressures. His character embodies themes of love, longing, and the struggles of living authentically in a world that is not accepting of his identity. Jack's journey highlights the challenges faced by LGBTQ+ individuals during that era.