Trivia: In one of the first episodes of the second season, Brooke is talking to Peyton about Lucas, and she says "love triangles are so last season". In the first season, Brooke, Peyton, and Lucas were in a love triangle.
Trivia: Gavin DeGraw had released the song "I Don't Want To Be" on his album 2 years before the show ever aired and only after it became the theme song did it go platinum.
Trivia: The show was named after the song "One Tree Hill" from U2's acclaimed album The Joshua Tree.