Castle Crags is located between Dunsmuir and Mount Shasta along Highway 5. It is a pretty good workout climbing up to Castle Dome.
The images were combined in photo shop.
I had envisioned this composition with the North Star over Castle Dome and Mount Shasta in the background. I composed the scene before darkness fell and started a series of exposures once the sky got dark. The moon provided some light on the foreground before it set and I went to sleep with the camera still capturing frames. This shot includes about 3 hours of star circles.