The sexuality of the main characters has been subject to discussion. Brokeback Mountain has also been regarded as a turning point for the advancement of queer cinema into the mainstream.
In 2018, the film was selected for preservation in the United States National Film Registry by the Library of Congress as being 'culturally, historically, or aesthetically significant'. In Wyoming in 1963, cowboys Ennis Del Mar and Jack Twist are hired by foreman Joe Aguirre to herd his sheep through the summer on grazing pastures on Brokeback Mountain. After a night of heavy drinking, Jack makes a pass at Ennis. While initially reluctant, Ennis becomes receptive, and he and Jack have sex in their tent. Despite Ennis telling Jack that it was a one-time incident, they develop a sexual and emotional relationship.
Before parting ways, Ennis and Jack have a brawl that leaves both of them bloodied.