Where does Chris get lost on his first road trip?

After graduation, Chris’s parents throw him a party, and he gives his dad an expensive telescope and a moving speech of thanks. He then leaves for his first road trip, which takes him across the country, and lasts until two days before the fall semester starts at Emory. He returns back thirty pounds lighter, and very scruffy looking. Near the end of his trip, he had gotten lost in the Mojave Desert, and almost died of dehydration.