The San Diego Zoo Safari Park, located in the San Pasqual Valley, is roughly 32 miles NE of the San Diego Zoo. Both are run by the Zoological Society of San Diego. But they are two very different attractions. The Safari Park features animal exhibits similar to the zoo, but also includes huge expansive areas where herds of animals roam across natural habitats in a 1,800-acre reserve.
You'll need to take a tram to view the free-range areas of the park, but there are plenty of exhibits to view on foot. The Red River Hog exhibit is one of them. And during a visit to the park, I was lucky enough to see the 4 new young piglets, recently born at the park.
Red River Hog Sign