The Castle Mountains are a mountain range located in the state of Montana, USA. They are part of the larger Rocky Mountains and are known for their rugged terrain and scenic beauty. The range features a variety of ecosystems, including forests, meadows, and alpine areas, making it a popular destination for outdoor activities such as hiking and wildlife viewing. The Castle Mountains are also home to the Castle Mountains Wilderness, which protects the area's natural resources and provides habitat for diverse wildlife. This wilderness area offers visitors opportunities for camping, fishing, and exploring the stunning landscapes that characterize this unique region.