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Keystone Hotel

219 4th St.
Castle Rock
80104

The 1901 two-story commercial building, along with its 1910 addition, served as a social hub of the community. For many years it was the only hotel in town, and a saloon or restaurant continuously occupied the corner location from 1901 until the 1960s. The building is a good example of the use of locally quarried rhyolite.