Roxborough State Park, State park in Douglas County, Colorado.

Roxborough State Park is a 3,339-acre Colorado state park in Douglas County, 20 miles south of Denver. Its red sandstone Fountain Formation beds, about 300 million years old, tilt at a 60-degree angle, forming angled slabs and fins with sharp peaks above low green shrubs. Elevations run from 5,900 to 7,280 feet.

The area gained protection starting in 1975 and expanded over subsequent years, while receiving recognition as a National Natural Landmark in 1980. This designation acknowledged the site's geological and ecological importance.

Roxborough State Park is a State Historic Site and a National Cultural District, a designation that reflects the archaeological sites recorded within its boundaries. The park's name comes from the Roxborough district of Douglas County in which it lies. Visitors today walk the trail network past those sites and through ponderosa pine and Douglas fir woodland.

The visitor center provides orientation and information about trails and wildlife viewing throughout the park. A daily vehicle pass grants access to explore the grounds at your own pace.

The site displays rock layers from multiple geological periods, with each stratum representing different eras in Earth's history. Visitors walking through can literally see these different time periods stacked before them.