Del Mar Fair 2025 Tickets. Our community’s fair — the biggest bash of the summer in san diego. The 2025 san diego county fair is open june 11 through july 6 (closed mondays & tuesdays.) the fair is open from 11am to 11pm each day.
Learn about the various discounts and promotions available. Del mar fairgrounds, san diego ca , united states virtually all forms of outdoor recreation are represented at this enormous event.