The Land Before Time II: The Great Valley Adventure is the first of many animated sequels to the film The Land Before Time. It was released six years after the original. After the release of this sequel, all the films in the series have been released at a rate of one movie every one or two years. Directed/Produced by Roy Allen Smith. Produced by Zahra Dowlatabadi. Written by John Loy, John Lubin, and Dev Ross.