Columbia Chamber of Commerce See Columbia as a "complete community", more than a Goldrush attraction.  Upcoming events and links to local businesses. Tulomne County Visitors Bureau Visitor Bureau site with information on exciting places to go and things to do in Tuolumne County. Links to hotels/businesses/services. Calaveras County Visitors Bureau Visitor Bureau site with history, lodging, and events in Calaveras County. Springfield Flying Service Biplane rides, scenic tours, flight instruction, airplane rentals at the Columbia Airport. Courtney Aviation Scenic Tours of the Sierra Nevadas and the Mother Lode.