The Central Loudoun Basketball League (CLBL) is a recreational basketball league for boys and girls in grades 1 through 12 in the Heritage High School, Loudoun County High School, and Tuscarora High School attendance districts. CLBL also supports the teams representing JL Simpson Middle School, Smarts Mill Middle School, and Harper Park Middle School in the PRCS Middle School Travel League. Each season CLBL typically serves over 1,600 players, primarily in the Leesburg, VA area of Loudoun County.