Yes, there is a movie adaptation of the novel "Walk Two Moons" by Sharon Creech. It was released in 2002 and stars AnnaSophia Robb, Robert Duvall, and Gillian Anderson.
The movie follows the story of Sal, a young girl who embarks on a journey with her eccentric grandmother to find Sal's missing mother. The film received generally positive reviews, with praise for the performances and the touching story.