The 128-page guide covers the area from La Jolla north to Oceanside and east to Julian and Borrego Springs. See also my Web Links page. Take all day to make the tour circuit, if you wish. This is the way to start your visit to San Diego. The Old Town Trolley Tour bus stops at the Zoo.
Parking is free.
Caution, the Zoo is about 100 acres in an area of ravines and mesas, with some steep trails. There are moving sidewalks up from some ravine areas, but not all. I recommend that first time visitors take the 40 minute double-decker bus tour first, then go back to the areas of interest. Tiger River Southeast Asia climate zone. The Hippos dance for you, with great underwater views.