Grounds free. The 1-day Explorer Pass (includes admission to five participating Balboa Park museums) $46; $27 (ages 3-12). The 7-day Explorer Pass (includes admission to 17 participating Balboa Park museums) $57; $30 (ages 3-12). The 7-day Explorer Pass plus 1-day admission to San Diego Zoo $97; $62 (ages 3-12). Annual Explorer Pass (valid for 12 months from date of purchase) $129; $99 (ages 65+ and students with ID); $229 (family, two adults and up to four children ages 3-17). Tickets are available at the Balboa Park Visitors Center in the House of Hospitality building or at the museums.
Grounds open daily 24 hours. Guided park tours, which depart from the Balboa Park Visitors Center, are offered throughout the week; phone ahead for schedule.