he sixth season of One Tree Hill, an American television series, began on September 1, 2008 and concluded on May 18, 2009 with a total of 24 episodes. This is the third season to air on The CW television network. Season six regular cast members include Chad Michael Murray, James Lafferty, Hilarie Burton, Bethany Joy Galeotti, Sophia Bush, Paul Johansson, Lee Norris, Antwon Tanner, Jackson Brundage, Barbara Alyn Woods, and Lisa Goldstein.
The seasons seventh episode, "Messin' with the Kid" achieved a series high in Adults 18-34 with a 2.7 rating.
Season six is the final season for original cast members Chad Michael Murray and Hilarie Burton. Their characters, Lucas and Peyton, leave Tree Hill with their newborn baby in the finale.Overview from themoviedb.org