I don't have a very detailed route planned out,as normally I go about the zoo in a rather unstructured way,however I mostly start out with the reptile house+reptile walk,then go to Monkey Trails. From there I go from the tigers to hippos to the Leopards of Asia,then to eagle trail,up along the steep hillside,then to the row of aviaries beside Polar Bear Plunge (sometimes) then Polar Bear Plunge itself,then Elephant Odyssey. After EO I go to the kopje (which I don't think is open anymore),then to the Outback,urban jungle,and up bear canyon. Honestly there is no way to see the entire zoo without backtracking to some degree,which can be irritating. This route enables me to see everything I want to see,although it normally ends up causing me to miss the bonobos,gorillas,orangutans,and the aviaries,however alterations can be made to the route should you want to see those things. Up until this last trip I hadn't actually seen the pygmy hippos in a year,and I can't actually remember the last time I've seen the orangutans. I might have to carve a plan of attack to see the orangutans next time I go....