San Pasqual Battlefield State Historic Park
San Pasqual Battlefield State Historic Park is pet-friendly on certain days. The park honors the soldiers who fought in the battle between the U.S. and Californio forces on December 6, 1846 during the Mexican-American War. Although the park is only officially open on weekends, you can park up and wander into the area during the week too. The park's official opening times are from October to March from 10am to 4pm and between April to September from 10am to 5pm. You should call the park directly before bringing Fido to the park to check that they are welcome on the day you are visiting. Visit Website
Or call (760) 737-2201 for more information.