Come To Sierra Commons. Grow Your Mind. Grow Your Business.Sierra Commons develops and implements education and training programs designed to meet the needs of new, emerging, and small business owners and nonprofit organizations.All Classes are held at Sierra Commons,792 Searls Ave.in the 7 Hills Business District, Nevada City, unless otherwise noted.You can reach us at (530) 265-8443, or email info@sierracommons.org.