From 163 north exit at University. Go east on University to Park. Turn right on Park to the Zoo entrance. It's best to arrive early so you can get a parking spot close to the entrance and beat the crowds to the paths in the park.
Closing times vary with the season.
The Zoo provides parking, rest rooms, telephones and access to shows and exhibits for guests with disabilities. Keep in mind there are several areas within the Zoo with very steep grades, so those with limited mobility might need assistance in these areas. There are ASL bus tours available for the hearing impaired. If needed, you may call in advance to arrange for an interpreter.