The Downieville Classic is an annual mountain biking event held in Downieville, California. It features a mix of cross-country and downhill racing, attracting riders of various skill levels. The race typically takes place in August and includes stunning views of the Sierra Nevada mountains. Participants can choose from different race categories, including a challenging 30-mile course that descends over 5,000 feet. The event also includes a festival atmosphere with live music, food vendors, and bike-related activities, making it a popular gathering for both competitors and spectators alike.