Castle Rock

Castle Rock is a butte made of rhyolite stone that rises sharply from the landscape in Douglas County, Colorado, and dominates the view of the town below. The rock shows how layers of hard material have been exposed and shaped by wind and water over countless years.

When rhyolite deposits were found near the butte in the 1870s, settlers moved to the area and established permanent communities around it. The combination of valuable stone and the distinctive landmark shaped the growth of what became the town of Castle Rock.

Native American tribes like the Arapaho and Cheyenne used this formation as a key landmark for finding their way across the region. The rock became woven into their knowledge of the land and how they moved through it.

The butte is easily visible from town and serves as a helpful reference point for getting around the area. The site becomes particularly notable during the holiday season when a large electric star is lit on top, making it stand out even more against the sky.

The butte inspired the very name of the town, as early settlers thought its shape resembled a castle fortress. Walking through town and looking up at the distinctive profile explains exactly why that comparison made such sense to the people who settled here.

Location: Castle Rock

GPS coordinates: 39.37909,-104.85605

Latest update: December 10, 2025 15:47