Once again, the Castle Rock Museum is giving free walking tours of downtown Castle Rock each month from June to September. The 45-minute tour will begin at The Courtyard on Perry Street, 333 Perry St., and will conclude at the Castle Rock Museum, 420 Elbert Street. The tour will highlight the history of Castle Rock and its many historic buildings. For more information, contact the Castle Rock Museum at (303) 814-3164 or museum@castlerockhistoricalsociety.org.