Columbia, CA… February 11th, 2023, 1:00 PM-4:00 PM. Every second Saturday of the month see inside special exhibits, stores and residences not regularly open to the public. Docents in period attire provide demonstrations and history of the times for visitors. If you’re lucky, the gambling table will be set up on the boardwalk for everyone to try their hand at betting against a mining camp gambler. Free Admission. Covid guidelines in effect.