Castle Rock Middle School is located in Billings Montana. Our library has a collection of over 9,000 Fiction, Nonfiction and Reference titles available for check out. We are open every day from 7:40 - 3:40 and students are welcome before school, after school and during lunch. Please get a pass from your teacher if you would like to come to the library during class time. Computers and internet access are also available in the library for student use.