Any individual may reserve up to 4 hours in any calendar month. Weekday reservations (Monday through Thursday evenings) may not exceed 1 hour, and Friday, Saturday, and Sunday reservations may not to exceed two hours. The goal of this provision is to ensure that walk-up reservations are used only by occasional users and not leagues or programs (which should be applied for months in advance). In addition, weekday reservations may only be booked starting at 6:30 p.m. and are booked by the half pitch. Call Permits and Reservations at 415-831-5500 to make a reservation.