Inferred you are referring to the story "Into the wild".
Step-by-step explanation:
Remember, in chapter 7 we are told that McCandles planned on going to Alaska after working till April 15 in Carthage, South Dakota.
Due to his bad relationship with his parents, he once said was "going to divorce them".
McCandles wanted to study the forest. This is evident in conversation with the truck who gave him a ride to Denali National Park. He told him he wants to "walk deep into the bush and 'live off the land for a few months.'"