The happy couple told a television station that they plan to leave Canton Township in Wayne County in mid-April, and that they expect the trek to prepare them to spend a lifetime together.
They hope to be in Las Vegas by September and plan to marry at nearby Lake Mead.
The 24-year-olds met in middle school, and got the idea for the trip from the book, "The Lost Art of Walking," by Geoff Nicholson.
Crist says they know their plan is "extremely crazy."
