Other References
In Koushun Takami's novel Battle Royale, the town from which the ill-fated students hail is called Shiroiwa, which translates as "Castle Rock".
In a scene from Peter Jackson's alien invasion movie Bad Taste, a signpost is shown with two directions listed: one towards to Kaihoro, the other leads to a town named Castle Rock. This has been confirmed as a reference to King's creation.
Castle Rock is mentioned in One on One, a 1993 novel by King's wife, Tabitha King. In an afterword, she thanks "another novelist who was kind enough to allow me" to borrow the name.
Read more about this topic: Castle Rock (Stephen King)