Loading view. There were no results found. There were no results found. Mendocino County Fairgrounds Events Venues Mendocino County Fairgrounds 14400 Highway 128 Boonville, CA 95415 United States Get Directions 707-895-3011 mendocountyfair.com/ Events at this venue Today Upcoming Upcoming Select date. Previous Events Today Next Events Subscribe to calendar Google Calendar iCalendar Outlook 365 Outlook Live Export .ics file Export Outlook .ics file