4700 Golf Ave. Clearlake, CA 95422 Phone: 707-994-3600 Fax: 707-994-6410 Email: clearlakechamber@mchsi.com Website: http://clearlakechamber.com Contact: Executive Director: Mark BredtEstablished: 1943: Number of members: 280: Number of employees: 2: International services?: Yes