Yorba Regional Park in Anaheim is a forested paradise with fishing lakes. Feels like Yorba Linda, but actually in Anaheim. 6 playgrounds!
Irvine Regional Park is an OC Parks regional park with playgrounds, the OC Zoo, Irvine Park Railroad, a lake, stable, surrey carts, & ponies.
Heritage Hill Historical Park in Lake Forest is a local treasure. Serrano and Whiting are familiar names for those traveling in Lake Forest.
Serrano Creek Park in Lake Forest is a natural looking OC playground tucked away by horse stables near a tree-covered trail for exploring.